kidney stones can contribute to urinary tract infections (UTIs) in some people.

A kidney stone does not automatically mean that an infection is present. However, stones can interfere with normal urine flow, provide a surface where bacteria may persist, or contribute to incomplete drainage of urine. These factors can increase the risk of urinary infection.

The relationship can also work in another direction. Certain types of urinary infections can contribute to the formation of specific stones, particularly infection-related stones such as struvite stones.

Therefore, when a person has both a kidney stone and symptoms of a UTI, it is important to determine whether there is an infection, obstruction or both.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides evaluation of kidney disease, urinary infections, kidney stones and associated kidney-function problems.

How Can a Kidney Stone Lead to a UTI?

The urinary system normally helps flush bacteria out through the continuous flow of urine.

A stone can interfere with this process in several ways.

1. Urinary Obstruction

A stone can partially or completely block urine flow.

When urine cannot drain normally, bacteria may remain within the urinary tract and multiply more easily.

2. Urine Stagnation

Obstruction can cause urine to remain in part of the urinary system for longer than normal.

This can create conditions that favor persistent infection.

3. Bacteria May Persist Around a Stone

Some bacteria can attach to surfaces within the urinary tract, and infection may be more difficult to completely clear when an underlying stone remains.

4. Recurrent Infection

A person who repeatedly develops UTIs may sometimes have an underlying urinary abnormality, including a stone or obstruction.

Repeated infections should therefore be evaluated rather than treated as isolated episodes indefinitely.

Can a UTI Cause Kidney Stones?

The relationship is not always one-way.

Certain bacteria can alter the chemistry of urine and contribute to the formation of infection stones, particularly struvite stones.

These stones can grow rapidly and may form large branching stones known as staghorn calculi.

Not every kidney stone is caused by infection. Common calcium-based stones have different mechanisms and are usually not the result of a UTI.

Determining the stone type can therefore be important when infections and stones occur repeatedly.

What Are the Symptoms of Kidney Stones With UTI?

When a kidney stone and urinary infection occur together, symptoms can vary according to the location of the stone and severity of the infection.

Possible symptoms include:

• Burning or pain while urinating

• Frequent urination

• Urgency to urinate

• Blood in the urine

• Cloudy or foul-smelling urine

• Flank or side pain

• Lower abdominal discomfort

• Nausea

• Vomiting

• Fever

• Chills

A simple stone may cause severe pain without infection.

In contrast, fever and chills are important warning signs of infection and should not be assumed to be caused by the stone alone.

What Does Kidney Infection From a Stone Feel Like?

If bacteria travel upward from the urinary tract and infect the kidney, a condition called pyelonephritis can develop.

Symptoms may include:

• Fever

• Chills

• Flank pain

• Pain below the ribs toward the back or side

• Burning urination

• Frequent urination

• Nausea or vomiting

• Feeling significantly unwell

If a stone is simultaneously blocking urine drainage, the situation can become particularly serious.

An infected and obstructed urinary tract requires prompt medical assessment.

Why Is an Infected Obstructed Kidney Dangerous?

An obstruction can prevent infected urine from draining normally.

In this situation, antibiotics alone may not always be sufficient because the blocked urinary system may need to be drained.

Depending on the circumstances, doctors may use:

• A ureteral stent

• A percutaneous nephrostomy tube

These procedures can restore urine drainage.

Definitive stone treatment is often planned after the infection has been appropriately controlled.

This is why fever with a known kidney stone should not be ignored.

Kidney Stones and Recurrent UTIs

Repeated UTIs may sometimes occur because an underlying stone or urinary abnormality has not been identified.

A specialist may investigate for:

• Kidney stones

• Ureteral obstruction

• Urinary retention

• Structural abnormalities

• Enlarged prostate in appropriate patients

• Recurrent infection with specific bacteria

• Other causes of impaired urinary drainage

If infections repeatedly return after apparently appropriate treatment, identifying the underlying cause becomes particularly important.

Which Kidney Stones Are Associated With Infection?

Several types of kidney stones exist, and their relationship with infection differs.

Struvite Stones

Struvite stones are strongly associated with certain urinary bacteria that produce the enzyme urease.

These stones can sometimes become large and form branching stones within the kidney.

Calcium Stones

Calcium oxalate and calcium phosphate stones are the most common types of kidney stones.

They are not usually caused by UTI, although a person with calcium stones can also develop a urinary infection.

Uric Acid Stones

Uric acid stones are associated with factors such as acidic urine and metabolic conditions.

They are not typically caused by bacterial urinary infection.

Stone analysis can help determine the composition when a stone is recovered.

How Is Kidney Stone-Related UTI Diagnosed?

A doctor may use several investigations to determine whether infection and obstruction are present.

Urine Routine Examination

A urine test can look for:

• White blood cells

• Red blood cells

• Bacteria

• Nitrites

• Other abnormalities

Urine Culture

A urine culture can identify the bacteria responsible for an infection and help guide antibiotic selection.

Blood Tests

Depending on the patient's condition, testing may include:

• Serum creatinine

• Kidney function

• Complete blood count

• Electrolytes

• Other markers of infection or organ function

Ultrasound

Ultrasound can help identify stones, kidney swelling and urinary obstruction.

CT Imaging

When more detailed assessment is required, a CT scan may provide information about:

• Stone size

• Stone location

• Number of stones

• Obstruction

• Kidney anatomy

The appropriate investigation depends on the patient's symptoms and clinical condition.

How Is UTI With Kidney Stones Treated?

Treatment depends on whether the infection is uncomplicated or associated with obstruction.

Antibiotics

A bacterial UTI may require an appropriate antibiotic selected according to the suspected or confirmed organism, infection severity and patient-specific factors.

The complete treatment plan should be determined by a healthcare professional.

Treating the Obstruction

If a stone is blocking urine flow and infection is present, restoring drainage may become an urgent priority.

A ureteral stent or nephrostomy may be used depending on the clinical situation.

Removing the Stone

Once the acute infection has been appropriately managed, definitive stone treatment may be considered.

Depending on the stone's characteristics, treatment can include:

• Ureteroscopy

• Laser lithotripsy

• Shock wave lithotripsy in selected cases

• Percutaneous nephrolithotomy for larger or complex renal stones

The procedure depends on stone size, location, composition, anatomy and overall health.

Can Antibiotics Alone Remove a Kidney Stone?

No.

Antibiotics treat bacterial infection; they do not physically remove most kidney stones.

A small stone may sometimes pass naturally, but larger stones or stones causing obstruction may require active treatment.

If infection keeps recurring because a stone remains in the urinary tract, the underlying stone may need to be addressed as part of long-term management.

Can Kidney Stones Cause a UTI Without Symptoms?

Yes, infection can sometimes be present with relatively few symptoms, particularly in certain patients.

However, the absence of fever or pain does not prove that there is no infection.

People with recurrent stones, recurrent UTIs, reduced kidney function or other risk factors may require appropriate urine and imaging evaluation even when symptoms are limited.

Can a Kidney Stone Cause Blood in Urine Without UTI?

Yes.

A stone can irritate the urinary tract and cause blood in the urine even when there is no infection.

Therefore, blood in urine does not by itself distinguish between a stone and a UTI.

Urine testing and clinical evaluation can help determine the cause.

What Happens If a Kidney Stone and UTI Are Left Untreated?

An untreated stone may continue to cause obstruction, pain or recurrent urinary problems.

An untreated urinary infection can potentially spread upward and affect the kidneys.

If infection occurs behind an obstruction, the risk of serious complications is greater.

Possible complications can include:

• Worsening kidney infection

• Reduced kidney function

• Severe systemic infection

• Recurrent urinary infections

• Persistent obstruction

Prompt evaluation is particularly important when fever, chills, reduced urine output or severe illness develops.

When Is Kidney Stone-Related UTI an Emergency?

Seek urgent medical attention if a person with a known or suspected kidney stone develops:

• High fever

• Chills or shaking

• Severe flank pain with fever

• Persistent vomiting

• Very little or no urine

• Confusion

• Severe weakness

• Rapidly worsening symptoms

• Fainting or significant deterioration

A blocked urinary tract with infection can require emergency drainage and hospital-based treatment.

Do not attempt to manage these symptoms with home remedies alone.

Does Drinking More Water Treat a UTI Caused by a Stone?

Adequate hydration can be important for many people, but water does not replace antibiotic treatment when a bacterial infection is present.

Similarly, drinking excessive quantities of water does not reliably push an obstructing stone through the urinary tract.

People with kidney disease, heart disease, significant obstruction or fluid restrictions should follow individualized fluid advice from their healthcare professional.

How Can Kidney Stone-Related UTIs Be Prevented?

Prevention depends on why the stones and infections are occurring.

Potential measures include:

Maintain Appropriate Fluid Intake

Adequate fluid intake can help reduce the concentration of stone-forming substances and support urinary health.

The target should be individualized according to health status.

Treat Infections Appropriately

Complete prescribed treatment and follow medical advice regarding urine cultures and follow-up.

Investigate Recurrent UTIs

Repeated infections may warrant evaluation for stones, obstruction or other urinary abnormalities.

Assess Recurrent Stones

Stone analysis and, in selected patients, metabolic testing can help identify factors contributing to stone formation.

Reduce Excess Dietary Sodium

High sodium intake can increase the risk of some types of kidney stones and can also contribute to high blood pressure.

Follow an Individualized Diet

Dietary recommendations depend on stone composition, kidney function and other health factors.

Avoid extreme diets or unnecessary food restrictions without professional guidance.

Can Kidney Stones Damage the Kidneys?

A kidney stone does not necessarily cause permanent kidney damage.

However, prolonged obstruction, repeated infections or severe complications can affect kidney function.

The risk may be greater when:

• Both kidneys are affected

• A person has a single functioning kidney

• Obstruction is prolonged

• Infection occurs behind the obstruction

• Existing kidney disease is present

Kidney-function testing may therefore be appropriate in patients with significant stones or complications.

What Should You Do If You Have Both a Kidney Stone and UTI?

Do not assume that treating only one problem will resolve everything.

A healthcare professional may need to determine:

1. Whether a true bacterial infection is present.

2. Whether the stone is causing obstruction.

3. Whether kidney function has been affected.

4. Whether urgent drainage is required.

5. When and how the stone should be removed.

6. How future stones or infections can be prevented.

This approach helps address both the infection and the underlying urinary problem.

Kidney Stone and UTI Evaluation at Prabhakar Bhurke Clinic

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides individualized assessment for patients with kidney stones, urinary infections and kidney-function concerns.

Depending on the clinical situation, evaluation may include:

• Review of stone history

• Urine examination

• Urine culture review

• Creatinine and kidney-function assessment

• Ultrasound or CT report review

• Assessment for urinary obstruction

• Evaluation of recurrent infections

• Assessment of kidney complications

• Coordination with appropriate urological specialists when a stone-removal procedure is required

Treatment recommendations depend on the patient's symptoms, infection status, stone characteristics, kidney function and overall medical condition.

Frequently Asked Questions

Can kidney stones cause UTI?

Yes. Kidney stones can increase the risk of UTI, particularly when they interfere with urine drainage or are associated with urinary abnormalities. Some infection-related stones can also develop because of specific bacteria.

Can a UTI cause kidney stones?

Certain bacteria can contribute to infection-related stones such as struvite stones. However, most kidney stones are not caused by UTIs.

What are the signs of a kidney stone infection?

Fever, chills, flank pain, burning urination, frequent urination, nausea and vomiting can occur when infection accompanies a kidney stone.

Is a kidney stone with fever dangerous?

It can be. Fever with a known or suspected obstructing stone may indicate an infected obstruction, which requires urgent medical evaluation.

Can antibiotics dissolve kidney stones?

No. Antibiotics treat bacterial infection but do not dissolve most kidney stones. The stone may need separate management.

Can kidney stones cause recurrent UTI?

Yes. A persistent stone or obstruction can contribute to repeated urinary infections in some patients.

Can a kidney stone block urine and cause infection?

Yes. Obstruction can impair urine drainage and may allow infection to develop or persist. An infected obstructed urinary tract can require urgent drainage.

Conclusion

Kidney stones can contribute to UTIs, particularly when they cause urinary obstruction, interfere with urine drainage or are associated with recurrent bacterial infection. At the same time, certain bacteria can contribute to the formation of infection-related stones.

The combination of a kidney stone and UTI deserves careful evaluation because infection behind an obstruction can become serious.

Urine testing, culture, kidney-function assessment and appropriate imaging can help determine whether infection, obstruction or both are present. Treatment may involve antibiotics, restoration of urine drainage and, when appropriate, definitive stone removal.

If you have recurrent UTIs, a known kidney stone, fever with urinary symptoms or symptoms suggesting urinary obstruction, seek timely medical evaluation.

For specialized assessment of kidney stones, urinary infections and associated kidney problems, consult Dr. Sandip Prabhakar Bhurke at Prabhakar Bhurke Clinic.

Medical Disclaimer

This article is intended for general educational and informational purposes only and should not be considered a substitute for medical diagnosis, treatment or professional advice. Kidney stones and urinary tract infections can have different causes and may require different treatments. Antibiotics should be used only under appropriate medical guidance, and stone treatment depends on its size, location, composition, obstruction and the patient's overall condition. Do not attempt to treat an obstructing stone or suspected kidney infection solely with home remedies or excessive fluid intake. Fever, chills, severe flank pain, persistent vomiting, very little or no urine, confusion or rapidly worsening symptoms may indicate a serious complication requiring urgent medical attention. Consult Dr. Sandip Prabhakar Bhurke or another qualified healthcare professional for individualized evaluation and treatment.