A urinary tract infection (UTI) can cause kidney pain if the infection spreads from the bladder to one or both kidneys. This condition is called pyelonephritis, or a kidney infection.

A lower urinary tract infection commonly causes burning during urination, frequent urination and discomfort in the lower abdomen. When infection involves the kidneys, a person may also develop pain in the side or back, fever, chills, nausea or vomiting. (NIDDK)

Pain around the kidney area should not automatically be attributed to a urine infection. Kidney stones, urinary obstruction, muscle problems and other conditions can produce similar discomfort.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist evaluation for kidney-function concerns and kidney conditions that may be associated with urinary infections.

How to Recognize Kidney Pain Associated With a Urine Infection

Kidney-related pain is often felt in the flank, the area on either side of the back beneath the lower ribs. It may occur on one side or both sides and can extend toward the abdomen or groin.

When infection is responsible, pain may occur alongside other symptoms, such as:

• Burning or pain while urinating

• Needing to urinate more frequently

• A sudden or urgent need to urinate

• Fever or chills

• Cloudy or bloody urine

• Unusual urine odor

• Nausea or vomiting

• Feeling unusually weak or unwell

These symptoms can vary between individuals. Older adults and people with underlying medical conditions may not always develop the typical combination of fever and urinary symptoms. (NIDDK)

Important: Suspected kidney infection needs prompt medical assessment. Do not wait for every symptom to appear before seeking care.

Bladder Infection Versus Kidney Infection

Although both conditions are UTIs, the location of the infection influences the symptoms and the urgency of treatment.

A bladder infection can spread upward through the urinary tract and involve the kidneys. Early diagnosis and appropriate treatment help reduce the risk of complications. (NIDDK)

Why Does a Urine Infection Spread to the Kidneys?

Most kidney infections begin when bacteria enter the urinary tract and reach the bladder. The infection can then travel through the ureters toward the kidneys.

Certain factors can increase the likelihood of a complicated infection, including:

Urinary Tract Blockage

A kidney stone, an enlarged prostate or a narrowing in the urinary tract can obstruct normal urine flow. Urinary stasis can increase the risk of infection and make treatment more complicated.

Incomplete Bladder Emptying

People who cannot empty their bladder completely may be more susceptible to urinary infections.

Diabetes

Diabetes can increase the risk of urinary infections and may complicate recovery, particularly when blood glucose is poorly controlled.

Pregnancy

Urinary infections during pregnancy require prompt assessment because they can pose risks to both the pregnant person and the pregnancy.

Recurrent Urinary Infections

Repeated infections may indicate an underlying urinary tract abnormality, stone, obstruction or another contributing condition.

Reduced Immunity or Existing Kidney Disease

People with certain chronic illnesses, kidney disease or weakened immune systems may be at increased risk of complications. (NIDDK)

How Is a Kidney Infection Diagnosed?

Symptoms alone cannot confirm whether an infection has reached the kidneys. A doctor may combine a physical examination with urine tests, blood tests and imaging when necessary.

1. Urinalysis

A urine sample may be examined for white blood cells, blood, bacteria and other abnormalities that can support the diagnosis of a urinary infection.

2. Urine Culture

A urine culture can help identify the bacteria responsible for the infection and guide antibiotic selection. It is particularly useful when a kidney infection or complicated UTI is suspected.

3. Blood Tests

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

• Serum creatinine and eGFR

• Complete blood count

• Electrolytes

• Other markers of infection or kidney function

These tests can help assess the severity of illness and whether kidney function may be affected.

4. Ultrasound or CT Imaging

Imaging may be recommended if a stone or obstruction is suspected, infections recur, symptoms are severe, or the patient does not improve as expected.

Imaging is not necessary for every uncomplicated infection; the decision depends on the clinical situation. (NIDDK)

What Is the Treatment for Urine Infection With Kidney Pain?

Treatment depends on whether the infection affects the bladder or kidneys, the severity of illness, the suspected or confirmed bacteria, kidney function and the patient's other medical conditions.

Antibiotics for Kidney Infection

Bacterial kidney infections are generally treated with antibiotics prescribed by a healthcare professional.

The choice of antibiotic depends on factors such as:

• Likely or confirmed bacteria

• Urine culture results

• Local antibiotic resistance

• Allergy history

• Kidney function

• Pregnancy status

• Severity of the infection

Some patients can be treated with oral antibiotics, while those who are seriously ill may require hospital care and intravenous antibiotics. Treatment may be adjusted when culture results become available. (NIDDK)

Take the medicine for the prescribed duration. Do not use leftover antibiotics or stop treatment early without medical advice.

Pain and Fever Management

A healthcare professional may recommend suitable medicines to manage pain or fever. The safest option depends on kidney function, hydration, other medications and medical history.

Some painkillers, particularly nonsteroidal anti-inflammatory drugs (NSAIDs), can be harmful in certain people with kidney disease or dehydration. Ask a healthcare professional before using them if kidney involvement is suspected.

Treating a Blockage

If a kidney stone or another obstruction is contributing to the infection, antibiotics alone may not be sufficient.

An infected, obstructed urinary tract can require urgent drainage using a ureteral stent or a nephrostomy tube. Definitive stone treatment may be performed after the infection has been appropriately managed.

Can a Urine Infection Damage the Kidneys?

Many kidney infections recover with appropriate, timely treatment. However, a severe or untreated infection can lead to serious complications, including sepsis, kidney injury and, in some cases, lasting kidney damage.

The risk may be higher in people with diabetes, existing kidney disease, recurrent infections, urinary obstruction or a weakened immune system. (NIDDK)

Prompt evaluation is especially important when urinary symptoms occur with fever, flank pain, vomiting or reduced urine output.

What Can You Do While Receiving Treatment?

Home measures can support comfort but cannot replace antibiotics when a bacterial kidney infection requires treatment.

• Rest while recovering.

• Drink fluids according to your healthcare professional's advice.

• Take prescribed medicines exactly as directed.

• Monitor fever, pain and urine output.

• Seek reassessment if symptoms worsen or do not improve as expected.

• Avoid unprescribed antibiotics and potentially kidney-harming painkillers.

People with advanced kidney disease, heart failure or a prescribed fluid restriction should not increase their water intake without medical guidance.

When Is Urine Infection With Kidney Pain an Emergency?

Seek urgent medical care if urinary symptoms or kidney-area pain occur with:

• Fever and shaking chills

• Severe or worsening flank pain

• Repeated vomiting or inability to keep fluids down

• Very little or no urine

• Confusion or unusual drowsiness

• Rapid breathing, faintness or severe weakness

• Rapid deterioration in overall health

Fever or chills together with suspected urinary obstruction can indicate a medical emergency. Severe infection can progress to sepsis and requires immediate assessment. (NHS)

People who are pregnant, have diabetes, are immunocompromised or already have kidney disease should seek prompt professional advice when a kidney infection is suspected.

How Can Recurrent Urine Infections Be Reduced?

Not every urinary infection can be prevented, but some measures may support urinary tract health:

• Drink an appropriate amount of fluid, according to your medical needs.

• Avoid delaying urination repeatedly.

• Try to empty the bladder fully.

• Follow medical advice for diabetes management.

• Investigate recurrent infections rather than repeatedly self-treating them.

• Seek assessment for possible stones, urinary retention or obstruction when indicated.

• Follow the prescribed treatment plan and attend recommended follow-up appointments.

If infections keep returning, the doctor may recommend additional testing to look for an underlying cause.

Kidney and Urinary Infection Evaluation at Prabhakar Bhurke Clinic

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

Depending on the clinical findings, care may involve:

• Reviewing urinary symptoms and medical history

• Assessing kidney function

• Reviewing urine and blood test results

• Evaluating protein or blood in urine

• Assessing diabetes and blood pressure

• Reviewing imaging for possible obstruction

• Monitoring kidney function during recovery

• Coordinating with urology or hospital services when a stone, blockage or other complication requires specialist intervention

A nephrologist evaluates medical kidney problems, while a urologist may be needed for certain structural or procedural conditions. The appropriate care pathway depends on the diagnosis.

Frequently Asked Questions

Can a urine infection cause pain near the kidneys?

Yes. If a urinary infection reaches one or both kidneys, it may cause pain in the side or back beneath the ribs, often with fever, chills or urinary symptoms.

How do I know if a UTI has reached my kidneys?

Flank or back pain accompanied by fever, chills, nausea, vomiting or painful urination can suggest a kidney infection. Medical evaluation and appropriate testing are needed to confirm the diagnosis.

Can kidney infection occur without burning urination?

Yes. Symptoms vary, and some people may not have every typical urinary symptom. Persistent flank pain with fever or feeling very unwell warrants prompt assessment.

Which test confirms a kidney infection?

Doctors commonly use symptoms, examination, urinalysis and urine culture. Blood tests and imaging may be needed depending on severity and the possibility of obstruction or complications.

How long does kidney infection treatment take?

The duration depends on the antibiotic, the severity of infection, the patient's health and whether complications are present. Follow the prescribed treatment plan and seek reassessment if symptoms worsen or fail to improve as expected.

Can kidney stones cause a urine infection and kidney pain?

Yes. Stones can obstruct urine flow and may coexist with infection. An infected obstruction needs urgent medical assessment and may require drainage as well as antibiotics.

Should I drink lots of water to treat kidney infection?

Adequate hydration may be helpful, but excessive water does not cure a kidney infection. Fluid intake should follow medical advice, particularly for people with kidney failure, heart failure or fluid restrictions.

Conclusion

Urine infection with kidney pain may indicate a kidney infection rather than a simple bladder infection. Burning urination, frequent urges to urinate and lower abdominal discomfort can occur with a bladder infection, while flank pain, fever, chills, nausea or vomiting raise concern for kidney involvement.

Prompt medical assessment helps establish the diagnosis and determine whether antibiotics, blood tests, imaging or treatment for a urinary blockage are needed. An infected obstruction can be dangerous and should not be managed with home remedies alone.

For individualized evaluation of kidney-function concerns and related urinary complications, consult Dr. Sandip Prabhakar Bhurke at Prabhakar Bhurke Clinic.

Medical Disclaimer

This article is intended for general educational and informational purposes only and does not replace professional medical advice, diagnosis or treatment. Urinary symptoms and kidney-area pain can have several causes, and a kidney infection may require prompt antibiotic treatment. Do not self-prescribe antibiotics, stop prescribed medicines early or take painkillers without considering kidney function and other health conditions. Seek urgent medical attention for fever with flank pain, shaking chills, persistent vomiting, very little or no urine, confusion, severe weakness or rapidly worsening symptoms. Suspected infection with urinary obstruction requires urgent assessment. Consult Dr. Sandip Prabhakar Bhurke or another qualified healthcare professional for personalized evaluation and treatment.