Kidney stones can be associated with urinary tract infections (UTIs), particularly when a stone interferes with normal urine drainage.

A stone may partially or completely block the urinary tract. When urine cannot flow normally, bacteria may be more difficult to clear, increasing the risk of infection. Kidney stones and other urinary blockages are recognized risk factors for kidney infection.

However, not every person with a kidney stone develops a UTI, and not every UTI is caused by a stone.

The important clinical issue is determining whether an infection is present and whether the stone is obstructing urine flow.

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

Why Can a Kidney Stone Lead to Infection?

The urinary system normally carries urine from the kidneys through the ureters into the bladder and then out of the body.

A stone can interfere with this process.

The sequence may look like:

Kidney stone → impaired urine drainage → urinary stasis or obstruction → bacterial infection

A stone may also irritate the urinary tract and cause symptoms that resemble a UTI, such as burning urination or blood in the urine. This is why testing is important rather than assuming that every urinary symptom represents an infection.

A urinary blockage caused by a stone can also make an existing infection more serious.

What Are the Symptoms of UTI Due to Kidney Stones?

Symptoms can vary depending on whether the infection is limited to the lower urinary tract or has reached the kidney.

Possible symptoms include:

• Burning or pain while urinating

• Frequent urge to urinate

• Passing small amounts of urine

• Cloudy urine

• Strong-smelling urine

• Blood in the urine

• Flank or side pain

• Back pain

• Lower abdominal discomfort

• Fever

• Chills

• Nausea

• Vomiting

Kidney infection symptoms commonly include fever and chills, painful or frequent urination, back or side pain, and nausea or vomiting.

A kidney stone itself can also cause sharp flank pain, blood in the urine, urinary urgency and nausea or vomiting.

How Can You Tell a Kidney Stone From a UTI?

The symptoms can overlap.

Finding	Kidney Stone	UTI / Kidney Infection
Severe flank pain	Common	May occur with kidney infection
Burning urination	Possible	Common
Blood in urine	Commonly possible	Can occur
Frequent urination	Possible	Common
Fever	Usually concerning for infection	Common in kidney infection
Chills	Not typical of an uncomplicated stone	Can indicate infection
Nausea or vomiting	Common with severe stone pain	Can occur with kidney infection
Urinary obstruction	Can occur	Can be caused or worsened by a stone

A person can have both a stone and a urinary infection at the same time.

Fever or chills in a person with a known obstructing stone should therefore not be dismissed as “just stone pain.”

What Is an Infected Kidney Stone?

An infected kidney stone generally refers to a stone-associated urinary infection, particularly when infection occurs in a urinary system affected by obstruction.

Some stones, such as struvite stones, are associated with certain urinary infections and can grow in the presence of infection. Other types of stones can also coexist with infections, especially when they obstruct urine flow.

Treatment depends on:

• Stone size

• Stone location

• Degree of obstruction

• Type of stone

• Bacteria causing infection

• Kidney function

• Severity of infection

• Overall health

Why Is an Infected Obstructed Kidney Dangerous?

An infected kidney with significant urinary obstruction can become a serious medical emergency.

If infected urine cannot drain properly, infection may progress rapidly and can lead to severe systemic illness, including sepsis.

Urinary obstruction itself can cause kidney damage, and an obstruction complicated by infection requires particularly prompt treatment.

This is why antibiotics alone may not be enough when a stone is blocking infected urine.

The blocked urinary system may need to be drained urgently.

What Are the Emergency Warning Signs?

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

• Fever or chills

• Severe or worsening flank pain

• Persistent vomiting

• Very little urine

• Difficulty passing urine

• Confusion

• Severe weakness

• Rapid breathing

• Very low blood pressure or fainting

• Sudden deterioration in general health

Kidney infection can progress to sepsis, which can be life-threatening.

Fever plus flank pain in someone with a known urinary stone should receive prompt medical assessment.

What Tests Are Used When a Kidney Stone and UTI Are Suspected?

The doctor usually needs to investigate both infection and obstruction.

Urine Examination

A urine test may look for:

• White blood cells

• Red blood cells

• Bacteria

• Nitrites

• Other abnormalities

Urinalysis can provide evidence of both stone-related blood and urinary infection.

Urine Culture

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

This is particularly important when infection is complicated or recurrent.

Blood Tests

Depending on the patient's condition, doctors may check:

• Serum creatinine

• eGFR

• Complete blood count

• Electrolytes

• Blood glucose

• Other infection-related or kidney-related markers

Kidney function becomes especially important when obstruction or severe infection is present.

Imaging

Ultrasound, CT or other appropriate imaging may be used to determine:

• Stone size

• Stone location

• Number of stones

• Hydronephrosis

• Degree of obstruction

• Other urinary abnormalities

Imaging can help determine whether a stone is physically blocking urine drainage.

How Is UTI Due to Kidney Stones Treated?

Treatment is not identical for every patient.

The approach generally addresses two separate problems:

1. The infection

2. The stone or urinary obstruction

Antibiotics for the Infection

When a bacterial UTI or kidney infection is diagnosed, appropriate antibiotics are prescribed.

The choice depends on factors such as:

• Likely or confirmed bacteria

• Urine culture results

• Antibiotic resistance

• Drug allergies

• Kidney function

• Severity of illness

• Other medications

Kidney infections may require oral antibiotics in some patients or intravenous antibiotics when the infection is severe.

Relieving the Obstruction

If an infected urinary tract is blocked by a stone, urgent drainage may be necessary.

Depending on the situation, urine drainage may be established using:

• A ureteral stent

• A nephrostomy tube

These procedures allow urine to drain from the kidney while the infection is treated.

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

Why Is the Stone Not Always Removed Immediately?

When infection is present together with obstruction, the immediate priority may be safe drainage and control of infection, rather than attempting definitive stone removal during the acute infected phase.

Once the patient has stabilized, the treating team can plan the appropriate stone procedure based on:

• Stone size

• Location

• Composition or density

• Anatomy

• Kidney function

• Infection status

• Overall health

Possible definitive procedures include ureteroscopy, laser lithotripsy, shock wave lithotripsy in selected cases or PCNL for appropriate larger stones.

Can Antibiotics Alone Cure a UTI Caused by a Kidney Stone?

Not always.

Antibiotics can treat the bacterial infection, but they do not physically remove a stone that is blocking urine flow.

If obstruction persists, infection may recur or fail to resolve adequately.

Therefore, when imaging shows significant obstruction, the medical team may need to address the blockage as well as treat the infection.

Can a Kidney Stone Cause Recurrent UTIs?

Yes.

A persistent stone, urinary obstruction or certain infection-associated stones can contribute to repeated urinary infections.

If someone repeatedly develops UTIs, particularly alongside flank pain or known stones, the urinary tract may need evaluation for:

• Kidney stones

• Obstruction

• Incomplete bladder emptying

• Structural abnormalities

• Other urinary causes

Finding and treating an underlying urinary problem can be important for preventing recurrence.

Can a UTI Make Kidney Stones Worse?

An infection does not necessarily make every stone physically grow, but infection and obstruction can create a more complicated clinical situation.

Certain infection-associated stones can develop in connection with specific bacteria. Other stones may become problematic because infection occurs behind an obstruction.

Therefore, a patient with stones and recurrent infection may need evaluation of both the stone type and the urinary tract.

What Happens If the Infection Reaches the Kidney?

A lower urinary infection can travel upward through the urinary tract and cause pyelonephritis, or kidney infection.

Symptoms can include:

• Fever

• Chills

• Flank or back pain

• Painful urination

• Frequent urination

• Nausea

• Vomiting

• Cloudy, bloody or foul-smelling urine

A kidney infection requires medical treatment. Delaying evaluation can increase the risk of serious complications.

Can Kidney Stones Cause Kidney Damage?

A kidney stone does not necessarily cause permanent kidney damage.

However, prolonged or significant urinary obstruction can impair kidney function. The risk becomes more concerning when obstruction is severe, affects both kidneys or occurs in a person with limited kidney function.

An obstructed urinary tract can also become infected, creating additional risk.

For this reason, persistent obstruction should not be ignored simply because pain has temporarily improved.

What About Kidney Stones in a Person With CKD?

Someone who already has chronic kidney disease requires additional caution.

A stone-related obstruction or infection may further affect kidney function.

The treating team may therefore monitor:

• Creatinine

• eGFR

• Potassium

• Urine output

• Blood pressure

• Infection markers

• Fluid status

Treatment and medication choices may also need adjustment according to kidney function.

Can Drinking More Water Treat an Infected Kidney Stone?

Water is not a substitute for treatment of an infected obstructed urinary tract.

For uncomplicated small stones, appropriate fluid intake may be part of conservative management when advised by a healthcare professional. However, someone with severe infection, vomiting, kidney failure, heart disease or urinary obstruction may have individualized fluid requirements.

Do not attempt to force a blocked stone through the urinary tract by drinking excessive quantities of water.

How Can Future Stone-Related UTIs Be Prevented?

Prevention depends on why the stone and infection developed.

Depending on the situation, a doctor may recommend:

• Stone analysis

• Metabolic evaluation

• Appropriate fluid intake

• Dietary sodium reduction

• Treatment of recurrent infections

• Management of urinary obstruction

• Preventive stone medicines when indicated

• Follow-up imaging

• Periodic kidney-function monitoring

Some infection-related stones require particular attention because recurrence can occur if the underlying infection and stone burden are not adequately addressed.

When Should a Kidney Stone Be Removed?

Active stone treatment may be considered when a stone:

• Causes persistent obstruction

• Produces recurrent infection

• Causes ongoing or severe symptoms

• Is unlikely to pass naturally

• Contributes to declining kidney function

• Becomes progressively larger

• Causes complications

The exact procedure depends on stone characteristics and patient factors. Larger stones may require procedures such as PCNL, while selected stones can be treated with ureteroscopy or shock wave lithotripsy.

UTI and Kidney Stone Evaluation at Prabhakar Bhurke Clinic

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

Depending on the clinical situation, evaluation may include:

• Review of urinary symptoms

• Kidney-function assessment

• Urine routine examination

• Urine culture review

• Assessment of protein or blood in urine

• Ultrasound or CT review

• Evaluation of urinary obstruction

• Assessment of recurrent UTIs

• Medication review

• Monitoring of creatinine and electrolytes

• Coordination with an appropriate urological specialist when stone removal or drainage is required

The treatment strategy depends on whether the primary issue is infection, obstruction, stone burden, kidney dysfunction or a combination of these conditions.

Frequently Asked Questions

Can kidney stones cause a UTI?

Yes. A kidney stone can obstruct urine flow and increase the risk of urinary infection. However, not every person with a stone develops a UTI.

What are the symptoms of UTI due to kidney stones?

Possible symptoms include burning urination, frequent urination, cloudy or foul-smelling urine, blood in urine, flank pain, fever, chills, nausea and vomiting.

Is a kidney stone with fever an emergency?

A kidney stone accompanied by fever or chills can indicate infection. If the stone is also blocking urine flow, urgent medical treatment may be required because an infected obstruction can become life-threatening.

Can antibiotics remove a kidney stone?

No. Antibiotics treat bacterial infection but do not physically remove a stone. If the stone is causing significant obstruction, drainage or definitive stone treatment may be necessary.

Can an infected kidney stone damage the kidneys?

Yes. Prolonged urinary obstruction and severe infection can impair kidney function and may cause serious complications if treatment is delayed.

What is the treatment for an infected blocked kidney?

Treatment may involve antibiotics plus urgent drainage of the obstructed urinary system with a ureteral stent or nephrostomy. Definitive stone removal is generally planned according to the patient's condition after the acute infection has been addressed.

Can kidney stones cause repeated UTIs?

They can contribute to recurrent infections, especially when stones cause obstruction or when infection-associated stones are present. Recurrent UTIs with known stones warrant specialist evaluation.

Should I drink more water if I have a kidney stone and UTI?

Do not rely on excessive water intake to treat an infected or obstructed stone. Fluid requirements should be individualized, especially in people with kidney disease, heart disease, vomiting or fluid restrictions.

Conclusion

UTI due to kidney stones requires attention to both the infection and the underlying stone.

A stone can interfere with urine drainage and create conditions in which infection becomes more difficult to control. Symptoms such as burning urination, frequent urination, blood in the urine and flank pain may occur, while fever, chills, vomiting and worsening illness can indicate a more serious kidney infection.

The most important warning situation is an infected urinary tract with significant obstruction. This may require urgent antibiotics and drainage with a ureteral stent or nephrostomy before definitive stone removal is performed.

If you have a known kidney stone and develop fever, chills, severe flank pain, vomiting, reduced urine output or difficulty passing urine, seek urgent medical attention rather than attempting home treatment.

For individualized evaluation of kidney stones, urinary infections and kidney-function 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 medical advice, diagnosis or treatment. A urinary tract infection associated with a kidney stone can range from a manageable infection to a serious condition, particularly when urinary obstruction is present. Antibiotic selection, fluid management, drainage procedures and stone removal must be determined by qualified healthcare professionals based on the patient's symptoms, urine culture, imaging, kidney function and overall health. Do not self-prescribe antibiotics or attempt to force a stone through excessive water intake. Seek urgent medical attention for fever or chills with a known kidney stone, severe flank pain, persistent vomiting, confusion, very little or no urine, difficulty passing urine or rapidly worsening symptoms.