23 Strange Signs Your Kidneys Might Be in Trouble

Your kidneys work quietly every day, filtering waste from your blood, helping balance fluids and minerals, supporting healthy blood pressure, and performing several other essential jobs. Because they usually work without calling attention to themselves, it can be easy to overlook changes that may deserve medical attention.

One important fact is that early chronic kidney disease often causes few or no obvious symptoms. In many cases, blood and urine testing is the only way to discover that kidney function has started to decline.

When kidney problems become more advanced, however, the body may begin sending signals. Some are familiar, such as swelling or changes in urination. Others can seem unrelated to the kidneys, including tiredness, itching, difficulty concentrating, or muscle cramps.

Here are 23 signs worth knowing.

1. You Feel Unusually Tired

Feeling exhausted after a busy day is normal. But persistent or unexplained fatigue can sometimes occur when kidney disease becomes more advanced.

Kidney problems may contribute to anemia and the buildup of waste products in the bloodstream, both of which can leave a person feeling weak or unusually tired.

Fatigue has many possible causes, though, so it should never be assumed to mean kidney disease by itself.

2. You Wake Up to Urinate More Often

Needing to use the bathroom at night can become more common with kidney problems.

Changes in kidney function can affect how urine is produced and concentrated. However, nighttime urination can also have many other causes, including certain medications, urinary conditions, diabetes, or simply drinking a lot of fluids before bed.

A persistent change is worth discussing with a healthcare professional.

3. Your Urine Looks Foamy

Occasional bubbles in the toilet are not necessarily a problem. But urine that repeatedly appears unusually foamy may sometimes indicate excess protein in the urine.

Protein, particularly albumin, can leak through damaged kidney filters. A urine test can determine whether protein is actually present.

4. Your Urine Is Pink, Red, or Cola-Colored

Blood in the urine can sometimes be associated with kidney disease.

Pink, red, or cola-colored urine should not simply be ignored, particularly if the change is unexplained or keeps happening. Kidney disease is only one possible cause; urinary infections, stones, medications, and other conditions can also produce changes in urine color.

5. Your Feet or Ankles Become Swollen

Swelling, also called edema, is one of the more recognizable signs that fluid may be accumulating in the body.

When kidneys cannot remove enough extra salt and fluid, swelling can develop, particularly in the feet, ankles, legs, hands, or sometimes the face.

Swelling can also occur because of heart, liver, vein, or other health problems, so the cause needs to be evaluated.

6. Your Face or Eyes Look Puffy

Have you noticed puffiness around your eyes, especially when it seems unusual or persistent?

Fluid retention associated with kidney problems can sometimes cause swelling around the eyes and face.

Again, this symptom alone does not diagnose kidney disease.

7. Your Hands Feel Swollen

Rings that suddenly feel tighter or fingers that appear puffy may be another sign of fluid retention.

Kidney-related swelling can affect the hands as well as the legs and feet.

If swelling develops suddenly or becomes significant, medical evaluation is appropriate.

8. Your Urination Pattern Changes

A noticeable increase or decrease in how often you urinate can sometimes accompany kidney disease.

Some people urinate more often, while others may produce less urine as kidney function becomes severely impaired.

A sudden reduction in urine output can be particularly important and should be evaluated promptly.

9. Your Skin Becomes Very Dry or Itchy

Persistent itching can have many explanations, but advanced kidney disease can affect the body's mineral balance and contribute to dry, itchy skin.

If itching is severe, widespread, or unexplained, don't automatically blame dry weather or allergies. A healthcare professional can help determine the cause.

10. You Have Muscle Cramps

Leg or muscle cramps are common and can happen for many reasons.

However, muscle cramping can also occur with more advanced kidney disease, partly because kidney problems can interfere with the body's balance of fluids and minerals.

Frequent or severe cramps deserve attention, especially when they occur alongside other symptoms.

11. You Have Trouble Concentrating

Feeling mentally foggy, having difficulty concentrating, or struggling to stay focused can occur in advanced kidney disease.

As kidney function declines, waste products and changes in the body's internal balance can contribute to problems with concentration.

But concentration problems are also associated with poor sleep, stress, medications, nutritional problems, and numerous other conditions.

12. You Have Nausea

Persistent nausea may be another symptom that appears as kidney disease becomes more advanced.

When kidney function is severely reduced, waste products can accumulate in the bloodstream and contribute to nausea or vomiting.

Nausea is extremely common and is usually caused by something other than kidney disease, but persistent unexplained nausea should be evaluated.

13. You Lose Your Appetite

A reduced appetite can accompany worsening kidney disease.

Some people with advanced kidney disease experience nausea, changes in taste, or a general loss of interest in food.

Unintentional appetite loss should not be ignored, particularly when accompanied by weight loss or weakness.

14. You Lose Weight Without Trying

Unexpected weight loss is another change worth discussing with a healthcare professional.

Advanced kidney disease can be associated with poor appetite and weight loss.

However, unexplained weight loss can have many possible causes, so it requires proper evaluation rather than assumptions.

15. Food Tastes Different

Changes in taste can occur in advanced kidney disease. Some people may notice that foods taste strange or less appealing.

This can contribute to poor appetite and unintended weight loss.

If you suddenly notice a persistent change in taste, especially along with other symptoms, mention it to your healthcare provider.

16. You Have Trouble Sleeping

Sleep problems can occur in people with kidney disease.

Some people with more advanced CKD report difficulty sleeping, while itching, muscle cramps, restless sensations, or other symptoms may also interfere with nighttime rest.

Poor sleep itself can then worsen fatigue and concentration problems, creating a frustrating cycle.

17. You Feel Short of Breath

Shortness of breath can have many causes, including heart and lung conditions.

In advanced kidney disease, excess fluid can build up in the body and contribute to breathing problems.

New, severe, or rapidly worsening shortness of breath should receive prompt medical attention.

18. Your Blood Pressure Is High

High blood pressure and kidney disease are closely connected.

High blood pressure can damage the kidneys over time, while kidney disease can also contribute to high blood pressure.

The important point is that high blood pressure often has no noticeable symptoms, making regular blood-pressure checks important.

19. You Feel Weak

Persistent weakness can occur when kidney disease becomes advanced.

Anemia, waste buildup, nutritional problems, and other complications associated with reduced kidney function may contribute to weakness and low energy.

If weakness is persistent or worsening, it deserves medical evaluation.

20. You Experience Numbness or Tingling

Some people with advanced kidney disease may experience numbness or unusual sensations in their arms or legs.

There are many other possible causes of numbness and tingling, including nerve problems, diabetes, vitamin deficiencies, and circulation issues.

That is why testing is more reliable than trying to diagnose the cause from symptoms alone.

21. Your Weight Suddenly Goes Up

Unexpected weight gain can sometimes represent fluid accumulation rather than an increase in body fat.

When the kidneys have difficulty removing extra fluid and salt, swelling and fluid retention may occur.

A rapid unexplained increase in weight, especially when accompanied by swelling or breathing problems, deserves prompt medical attention.

22. You Notice Persistent Changes in Your Urine

Sometimes the most useful clue is simply that your urine looks or behaves differently than usual.

Changes can include:

• More frequent urination
• Less frequent urination
• Foamy urine
• Pink, red, or dark urine
• A noticeable change in urine volume

These changes do not automatically mean kidney disease. But persistent or unexplained changes should be discussed with a healthcare professional.

23. You Have No Symptoms at All

This may be the most surprising sign of all.

Kidney disease can exist without obvious symptoms.

Early chronic kidney disease often produces no noticeable warning signs. That's why someone can feel perfectly healthy while kidney damage is already developing.

For people with risk factors such as diabetes, high blood pressure, heart disease, or a family history of kidney failure, regular kidney testing is especially important.

How Do Doctors Check Kidney Health?

The good news is that checking kidney function doesn't require guessing based on symptoms.

Healthcare professionals commonly use blood and urine tests to evaluate kidney health.

A blood test can help measure kidney function, including estimated glomerular filtration rate (eGFR). Urine testing can look for albumin or other abnormalities that may indicate kidney damage.

These tests can sometimes identify problems before a person develops obvious symptoms.

Who Should Pay Extra Attention?

Certain conditions increase the risk of chronic kidney disease.

Important risk factors include:

• Diabetes
• High blood pressure
• Heart disease
• Family history of kidney failure
• Older age
• Previous kidney problems or injury

People with these risk factors should talk with their healthcare professional about appropriate kidney screening.

The Bottom Line

Your kidneys may not get much attention, but they are essential to keeping your body's internal environment balanced.

Swelling, foamy urine, blood in the urine, changes in urination, persistent fatigue, itching, muscle cramps, nausea, appetite changes, and difficulty concentrating can occur with kidney disease—particularly as the disease becomes more advanced.

But there is an important message to remember:

A symptom does not automatically mean your kidneys are failing, and having no symptoms does not guarantee that your kidneys are healthy.

The only reliable way to know how well your kidneys are functioning is through appropriate medical evaluation and testing.

If you notice persistent or unexplained changes, especially several symptoms together, speak with a healthcare professional. And if you have diabetes, high blood pressure, heart disease, or a family history of kidney failure, ask whether routine kidney testing is appropriate for you.

Your kidneys may be quiet—but paying attention to your health today can help you protect them for the future.

 

What Does “SSSS” on a Boarding Pass Mean? Here’s What Travelers Should Know

Seeing the letters “SSSS” printed on a boarding pass can be alarming, especially when a family member is already at the airport and suddenly calls home saying that security has stopped him for additional screening.

For many travelers, the first reaction is understandable: Did he do something wrong? Is he in trouble? Is he being investigated? Will he be allowed to board the plane?

The good news is that SSSS does not automatically mean that a traveler is in trouble or accused of a crime. In the United States, the abbreviation generally refers to “Secondary Security Screening Selection.” It means the passenger has been selected for additional security screening before boarding.

The process can take longer than ordinary airport security, but being selected does not, by itself, mean that the person has committed an offense.

What Is SSSS?

SSSS stands for Secondary Security Screening Selection.

When those four letters appear on a boarding pass, the passenger may be required to undergo additional screening at the airport. Instead of simply going through the normal security process, the traveler may be directed to a separate area or receive additional checks.

The extra screening can include procedures such as:

• Additional inspection of carry-on luggage
• Additional screening of electronic devices or belongings
• A more detailed physical screening
• Explosive-trace or other security screening
• Verification of identification and travel information
• Additional questions from security personnel

Exactly what happens can vary depending on the airport, the circumstances, and the security procedures being used.

For the traveler, the experience may feel stressful or inconvenient, particularly when they were expecting to walk through security quickly and proceed to their gate.

However, SSSS is a security-screening designation, not a declaration that someone is guilty of wrongdoing.

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Why Would Someone Get SSSS?

One of the biggest misunderstandings about SSSS is the assumption that there must be a serious reason behind it.

That isn't necessarily the case.

Travelers can be selected for additional screening for different reasons, and selection may sometimes be random. Security agencies generally do not disclose every factor used in screening systems, and travelers should be cautious about online claims that promise a simple explanation for exactly why a particular person received SSSS.

In some situations, the selection may be connected to travel circumstances or information associated with a reservation. In other cases, a traveler may simply be selected as part of a security-screening process.

The important point is this:

Getting SSSS does not automatically mean the traveler is suspected of committing a crime.

It also does not necessarily mean that the traveler will be prevented from boarding.

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Does SSSS Mean the Passenger Is in Trouble?

Usually, no—not by itself.

A person can receive additional screening and still complete the security process and board the scheduled flight.

Think of it as a signal that says:

“This passenger needs additional security screening.”

It does not necessarily say:

“This passenger has done something wrong.”

Airport security is designed to identify potential security concerns before passengers enter restricted areas or board aircraft. Additional screening is one of the tools used to accomplish that goal.

For the passenger, the best approach is generally to remain calm, cooperate with security instructions, and allow extra time for the process.

If security personnel ask questions, the traveler should answer truthfully and respectfully.

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What Happens After SSSS Appears?

The exact experience can differ, but a traveler selected for secondary screening may be directed to additional security personnel after presenting their boarding pass.

Instead of moving through the ordinary process as quickly as other passengers, they may be asked to undergo additional screening.

This could mean their bags are inspected more carefully or that they receive additional screening themselves.

The traveler may also experience delays.

That's one reason passengers with SSSS should avoid cutting their airport arrival time too close. If additional screening takes longer than expected, there may be less time to reach the gate.

This can be particularly stressful at busy airports, where security lines and screening procedures can already take significant time.

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Can You Still Board Your Flight?

In many cases, yes.

SSSS does not automatically mean that a passenger's flight is canceled or that they are prohibited from traveling.

The passenger still needs to complete the required security procedures.

If everything is satisfactory, the traveler can generally continue through the airport and proceed toward the gate.

Of course, airport security personnel have authority to take appropriate action if they discover an actual security concern. But the mere appearance of SSSS on a boarding pass should not be interpreted as proof that such a concern exists.

This distinction is important because the four letters can look frightening when a traveler doesn't know what they mean.

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Is SSSS the Same as Being Arrested?

No.

SSSS is not an arrest notice.

It is also not, by itself, a criminal charge, warrant, or statement that someone is wanted by law enforcement.

A traveler who sees SSSS should not immediately assume that police are waiting for them or that they are about to be detained.

The purpose of secondary security screening is related to aviation security.

A person can therefore encounter SSSS and simply go through a more extensive security process before continuing with their trip.

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Why Does the Experience Feel So Serious?

Part of the anxiety comes from the lack of explanation.

Imagine receiving your boarding pass, looking down, and noticing four unfamiliar letters printed on it.

You may immediately wonder:

Why me?

What did I do?

Did someone report me?

Will they let me on the plane?

That uncertainty can make an ordinary airport experience feel much more serious than it actually is.

Security screening is intentionally designed to be thorough. Travelers may not be given a detailed explanation of every factor behind a particular screening decision.

That doesn't necessarily mean something terrible has happened.

Sometimes, not knowing the exact reason is simply part of the security process.

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What Should a Traveler Do If They See SSSS?

The best response is simple: stay calm and prepare for additional screening.

A passenger who sees SSSS should consider the following:

1. Arrive early

Additional screening can take more time than standard screening.

If the passenger hasn't reached the airport yet, allowing extra time can reduce unnecessary stress.

2. Keep identification accessible

The traveler should have the required identification and travel documents ready.

Having documents organized can make the airport process easier.

3. Follow security instructions

Security personnel may provide instructions about bags, electronics, clothing, or additional screening.

The traveler should follow those instructions carefully.

4. Don't panic

SSSS does not automatically mean that the traveler has done anything wrong.

Remaining calm can make an already stressful situation easier to manage.

5. Be truthful

If security officers ask questions, the traveler should answer accurately.

Trying to hide information or becoming unnecessarily confrontational can make an already complicated situation more difficult.

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What About Carry-On Bags?

Additional screening can involve a passenger's luggage.

A carry-on bag may be opened and inspected more thoroughly than it would be during ordinary screening.

Security personnel may also examine particular items or ask the passenger to remove something from the bag.

This can take additional time.

Travelers should therefore avoid packing prohibited or questionable items in their carry-on luggage. Before traveling, it is wise to check the current airport-security rules for permitted and prohibited items.

Even something that seems harmless can sometimes require additional attention if it isn't packed correctly.

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Does Everyone With SSSS Get the Same Screening?

Not necessarily.

The exact procedures can vary.

One passenger might experience additional bag inspection, while another might receive more extensive screening.

Airport conditions, security procedures, destination, itinerary, and other circumstances can affect how the screening process unfolds.

That's why travelers should not rely too heavily on stories from other passengers.

Someone might say, “I got SSSS once and they did this,” while another person with the same designation may have a completely different experience.

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Can SSSS Be Removed From a Boarding Pass?

If someone repeatedly experiences difficulties with travel screening or believes they have been incorrectly identified or selected, there are official procedures available through the U.S. Department of Homeland Security for travelers who want to seek help resolving travel-screening problems.

One program commonly associated with this process is DHS TRIP, which stands for the Department of Homeland Security Traveler Redress Inquiry Program.

It is intended for travelers who have experienced certain travel-related screening or identification problems.

However, passengers should understand that submitting a complaint or inquiry does not necessarily mean that every future instance of additional screening will disappear.

Security decisions can involve information that travelers cannot see, and there is no simple public formula that guarantees a particular passenger will never receive additional screening.

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Is SSSS Always Random?

This is another area where people often become confused.

You may hear someone say that SSSS is always random. You may hear someone else claim that it always means the government has identified a specific person as suspicious.

Neither extreme is a reliable way to understand the designation.

Security screening systems can use multiple methods and criteria, and some additional screening can be random or unpredictable from the passenger's perspective.

The fact that a traveler doesn't know why they were selected doesn't mean that something sinister happened.

At the same time, travelers shouldn't assume that every case is simply a coin toss.

The safest conclusion is that SSSS means additional security screening is required, while the precise reason for a particular selection may not be disclosed.

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What If the Traveler Is Already at the Airport?

If your son or another family member calls from the airport saying that SSSS is printed on his boarding pass, there is usually no reason to immediately assume the worst.

He can calmly follow the airport's instructions and complete the additional screening.

The most practical advice is to tell him:

“Stay calm, cooperate with security, and allow yourself enough time.”

If he is delayed, he should pay attention to the time and communicate with the airline if necessary.

If a serious issue arises, airport or airline personnel can explain what the traveler needs to do next.

Family members waiting at home may feel helpless because they cannot see what's happening. But worrying that SSSS automatically means an arrest or criminal investigation can create unnecessary panic.

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What SSSS Does Not Automatically Mean

It is useful to separate facts from assumptions.

SSSS does not automatically mean:

• The traveler has committed a crime.
• The traveler is being arrested.
• The traveler cannot fly.
• The traveler is on a criminal watchlist.
• The traveler is considered dangerous.
• The flight will automatically be canceled.
• The traveler has done something wrong.

Instead, it means the traveler has been selected for secondary security screening.

The additional screening may be inconvenient, but inconvenience should not automatically be interpreted as guilt.

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Why Airport Security Uses Additional Screening

Air travel involves a large number of passengers, flights, airports, and security considerations.

Security systems therefore use different layers of screening rather than relying on one single checkpoint.

Secondary screening is one of those layers.

The goal is to make sure passengers and their belongings meet aviation-security requirements before they continue into the secure airport environment.

From a passenger's perspective, additional screening can feel frustrating—especially when they are running late or traveling with family.

From a security perspective, however, additional screening is part of the broader process designed to protect passengers and aircraft.

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The Bottom Line

If you see SSSS on a boarding pass, don't immediately panic.

The letters generally mean Secondary Security Screening Selection, indicating that the passenger should expect additional screening at the airport.

It can involve extra inspection of luggage, additional passenger screening, or other security procedures. It may take longer than ordinary screening, so travelers should allow extra time and follow instructions from security personnel.

Most importantly, SSSS alone does not mean that the traveler is guilty of anything or that they are automatically in trouble.

For a nervous parent receiving a phone call from the airport, those four letters can sound frightening. But understanding what they actually mean can put the situation into perspective.

The traveler should stay calm, cooperate with airport security, keep identification and travel documents available, and allow enough time to complete the process.

And if the traveler frequently encounters problems with airport screening or believes there is an ongoing identification issue, they can look into the appropriate official traveler-redress procedures rather than relying on rumors circulating online.

So if your boarding pass ever shows SSSS, take a breath. It means “additional security screening,” not “you have been found guilty of something.”