Kidney Stone Symptoms: 7 Warning Signs You Should Never Ignore

1. Sudden, Severe Pain in the Side or Back

One of the most characteristic symptoms of a kidney stone is kidney stone pain.

The pain may begin suddenly in the side or back, usually below the ribs. It can sometimes spread towards the lower abdomen, pelvis or groin as the stone moves through the urinary tract.

Unlike ordinary muscle pain, kidney stone pain may:

• Come in waves
• Change in intensity
• Shift location as the stone moves
• Make it difficult to find a comfortable position
• Be severe enough to interfere with normal activities

The intensity of pain does not necessarily indicate the size of the stone. Even a relatively small stone can cause significant pain if it obstructs the ureter.

2. Pain or Burning While Urinating

A stone that has moved closer to the bladder can cause discomfort during urination.

You may experience:

• Burning or pain while passing urine
• Discomfort at the tip of the urinary passage
• Increased urgency to urinate
• Frequent trips to the bathroom

These symptoms can sometimes resemble a urinary tract infection. If they occur alongside side or back pain, blood in the urine or other urinary changes, kidney stones may need to be considered.

3. Blood in the Urine

Blood in the urine, known medically as haematuria, can occur when a stone irritates or scratches the lining of the urinary tract as it moves.

The urine may appear:

• Pink
• Red
• Brown
• Tea-coloured

Sometimes the amount of blood is too small to be seen with the naked eye and is detected only through a urine test.

Blood in the urine should not automatically be assumed to be a kidney stone. Several urinary and kidney conditions can cause it, so medical evaluation is important.

4. Frequent Urge to Urinate

A stone near the lower end of the urinary tract can create a persistent sensation that you need to urinate.

You may notice:

• Frequent urination
• Sudden urgency
• Passing only a small amount of urine at a time
• Increased discomfort when urinating

If these symptoms occur together with severe pain or blood in the urine, it is advisable to seek medical evaluation.

5. Nausea and Vomiting

Kidney stone pain can be accompanied by nausea and vomiting.

This happens partly because the kidneys and gastrointestinal system share nerve pathways, so intense pain originating from the urinary tract can trigger gastrointestinal symptoms.

Persistent vomiting is particularly concerning because it can lead to dehydration and may make it difficult to maintain adequate fluid intake.

If severe pain and repeated vomiting occur together, prompt medical attention is recommended.

6. Cloudy or Foul-Smelling Urine

Changes in the appearance or smell of urine can sometimes occur with urinary tract problems.

Cloudy or foul-smelling urine may be associated with infection, particularly when accompanied by:

• Fever
• Chills
• Burning while urinating
• Increased urinary frequency
• Side or back pain

A kidney stone combined with a urinary infection can become serious if urine flow is obstructed. This situation requires urgent medical assessment rather than waiting for the stone to pass on its own.

7. Fever and Chills With Kidney Stone Symptoms

This is one of the most important kidney stone warning signs.

A kidney stone itself does not typically cause a fever. If you have symptoms suggestive of a stone along with fever or chills, it may indicate an infection in the urinary tract or kidney.

An infected, obstructed kidney can become a medical emergency.

Do not wait for the stone to pass naturally.

What Does Kidney Stone Pain Feel Like?

Kidney stone pain is often described as severe, cramping or sharp. It may begin suddenly and fluctuate in intensity.

A typical pattern may involve:

Kidney or side → back → lower abdomen → groin

However, not everyone experiences the same pattern.

Some stones cause a dull ache, while others produce intense waves of pain. The location of the pain can also change as the stone moves through the urinary tract.

Can You Have a Kidney Stone Without Symptoms?

Yes.

Small kidney stones can remain in the kidney without causing noticeable symptoms. Some are discovered incidentally during an imaging test performed for another reason.

Symptoms often develop when a stone moves into the ureter and interferes with urine flow.

This means the absence of pain does not always mean that a stone is not present.

What Causes Kidney Stones?

Kidney stones form when certain substances in urine become highly concentrated and form crystals.

Depending on the type of stone, these substances may include:

• Calcium
• Oxalate
• Uric acid
• Other mineral compounds

Several factors can increase the risk of developing stones, including:

• Inadequate fluid intake
• Previous kidney stones
• Family history
• High dietary salt intake
• Certain dietary patterns
• Obesity
• Certain metabolic conditions
• Some medications
• Recurrent urinary infections in certain types of stones

Understanding why a stone formed can be important for preventing future stones.

When Should You See a Doctor for Kidney Stone Symptoms?

Not every kidney stone requires an emergency procedure. However, medical evaluation is important if you experience:

• Severe or persistent side or back pain
• Blood in the urine
• Pain while urinating
• Repeated vomiting
• Difficulty passing urine
• Recurrent kidney stones
• Fever or chills along with urinary symptoms
• Symptoms that are getting worse rather than improving

A doctor may recommend urine and blood tests along with imaging to determine whether a stone is present and whether it is causing an obstruction.

When Is a Kidney Stone an Emergency?

Some symptoms require urgent medical attention.

Severe pain with fever

This can indicate an infected and obstructed urinary system.

Inability to pass urine

A significant blockage can interfere with normal kidney function and requires prompt assessment.

Persistent vomiting

Repeated vomiting can cause dehydration and prevent you from maintaining adequate fluid intake.

Severe symptoms in someone with a single functioning kidney

If you have only one functioning kidney, obstruction can be particularly concerning and should be assessed promptly.

Rapidly worsening symptoms

Increasing pain, fever, weakness or other significant changes should not be ignored.

How Are Kidney Stones Diagnosed?

If kidney stones are suspected, your doctor may recommend:

Urine Tests

A urine examination can detect blood, signs of infection and other abnormalities.

Blood Tests

Blood tests can help assess kidney function and identify certain factors that may contribute to stone formation.

Ultrasound

Ultrasound can identify many kidney stones and signs of urinary obstruction without exposing the patient to radiation.

CT Scan

A CT scan may be recommended when a more detailed assessment is needed, particularly when the diagnosis is uncertain or the location and size of the stone need to be determined accurately.

The choice of investigation depends on your symptoms, medical history and clinical assessment.

What Is Kidney Stone Treatment?

Kidney stone treatment depends on the stone's size, location, symptoms and whether it is causing complications.

Observation

Small stones that are likely to pass naturally may be monitored with appropriate medical guidance.

Medicines

Doctors may prescribe pain-relieving medicines and, in selected cases, medication that can help facilitate stone passage.

Ureteroscopy and Laser Treatment

If a stone does not pass or needs active removal, a urologist may recommend ureteroscopy. A thin instrument is passed through the urinary tract to reach the stone.

Laser energy can then be used to fragment the stone into smaller pieces for removal or passage.

Shock Wave Lithotripsy

Shock waves can be used externally to break certain kidney stones into smaller fragments.

Percutaneous Nephrolithotomy

For larger or complex kidney stones, a minimally invasive procedure called percutaneous nephrolithotomy may be recommended to remove the stone directly through a small access tract into the kidney.

The appropriate treatment depends on the individual stone and the patient's health.

Can Kidney Stones Be Prevented?

Once you have had a kidney stone, prevention becomes important because stones can recur.

Some general measures include:

• Drink adequate fluids
• Avoid excessive salt intake
• Maintain a healthy body weight
• Follow a balanced diet
• Stay physically active
• Follow your doctor's recommendations if you have a history of recurrent stones
• Get the stone analysed when possible

Your doctor may recommend specific dietary or medical measures depending on the type of stone and the results of urine or blood testing.

Frequently Asked Questions

Don't Ignore the Warning Signs

Kidney stones can range from an incidental finding to a painful condition requiring urgent intervention. Knowing the signs of kidney stones can help you recognise when professional care is needed.

Sudden severe side or back pain, blood in the urine, urinary discomfort, frequent urination, nausea, vomiting and changes in urine can all occur with kidney stones. But fever or chills combined with suspected kidney stone symptoms should be treated as a warning sign requiring prompt medical attention.

If you are experiencing symptoms or have a history of recurrent stones, don't rely on self-treatment alone. A proper diagnosis can determine whether observation, medication or a procedure is appropriate.

For those looking for a urologist in Coimbatore, Arrow Multispeciality Hospital provides specialist evaluation and treatment for urinary tract and kidney-related conditions.