There is no single medicine that is best for every type of kidney pain.

Kidney or flank pain can occur because of kidney stones, urinary obstruction, kidney infection, inflammation and other conditions. Pain that feels like it is coming from the kidney can also originate from muscles, the spine or nearby abdominal structures.

For this reason, choosing a pain medicine should begin with identifying the likely cause.

For example, pain from a kidney stone may be treated differently from pain caused by a kidney infection. A person with chronic kidney disease, dehydration, stomach ulcers, heart disease, pregnancy or certain other medical conditions may also need different pain-relief options.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist evaluation for kidney disease, abnormal kidney function and kidney-related symptoms.

Where Is Kidney Pain Usually Felt?

Kidney pain is generally felt in the flank or side of the back, below the ribs.

Depending on the cause, the discomfort may spread toward:

• Lower abdomen

• Groin

• Side of the abdomen

• Back

• Pelvic region

Kidney stone pain can be severe and may come in waves. It may be accompanied by nausea, vomiting or blood in the urine.

However, the location of pain alone cannot confirm that the kidneys are responsible.

Common Causes of Kidney or Flank Pain

Before choosing a medicine, the underlying cause needs to be considered.

Kidney Stones

A stone moving through the ureter can cause intense renal colic.

Possible associated symptoms include:

• Sudden flank pain

• Pain moving toward the groin

• Blood in urine

• Nausea

• Vomiting

• Urinary urgency

• Pain during urination

Larger stones can become lodged and obstruct urine flow.

Kidney Infection

Pyelonephritis, or kidney infection, may cause:

• Fever

• Chills

• Flank or back pain

• Painful urination

• Frequent urination

• Nausea or vomiting

• Cloudy, dark or foul-smelling urine

A kidney infection requires treatment of the infection itself, usually with appropriately selected antibiotics. Pain medicine alone does not treat the underlying infection.

Urinary Obstruction

A stone, narrowing or another blockage can interfere with urine drainage and cause pain.

If obstruction occurs together with infection, urgent medical treatment may be necessary.

Other Causes

Pain around the kidney region can also be caused by:

• Muscle strain

• Spinal problems

• Nerve-related pain

• Gallbladder conditions

• Gastrointestinal conditions

• Other abdominal or pelvic problems

This is why self-treatment based only on the location of pain can sometimes delay the correct diagnosis.

Which Medicines May Be Used for Kidney Stone Pain?

When kidney stone pain is confirmed or strongly suspected, doctors may use pain-relieving medicines according to the patient's health status.

Nonsteroidal Anti-Inflammatory Drugs

NSAIDs are commonly used for renal colic because they can reduce pain and inflammation associated with ureteral obstruction.

However, they are not appropriate for everyone.

Extra caution is required in people with:

• Reduced kidney function

• Chronic kidney disease

• Dehydration

• Certain stomach or intestinal problems

• Some heart conditions

• Certain bleeding risks

• Pregnancy, depending on the stage

A doctor should determine whether an NSAID is appropriate for an individual patient.

Paracetamol

Paracetamol may be considered for pain relief in selected patients.

The appropriate dose depends on factors such as age, liver health, other medicines and the total daily amount being taken.

Do not combine multiple products containing paracetamol without checking their ingredients.

Stronger Prescription Pain Medicines

Severe renal colic may sometimes require stronger prescription analgesics when other options are inadequate or unsuitable.

These medicines should be used under medical supervision because they can cause side effects such as drowsiness, nausea, constipation and, with some drugs, breathing problems or dependence.

Why Should People With Kidney Disease Be Careful With Painkillers?

A medicine that is suitable for one person may be inappropriate for someone with reduced kidney function.

Some pain medicines, particularly NSAIDs, can reduce kidney blood flow and may worsen kidney function in susceptible patients.

The risk can be higher when a person is:

• Dehydrated

• Elderly

• Living with CKD

• Taking certain blood-pressure medicines

• Taking diuretics

• Experiencing low blood pressure

• Acutely unwell

Therefore, people with known kidney disease should discuss regular or repeated painkiller use with a doctor.

Is Paracetamol Better Than an NSAID for Everyone With Kidney Pain?

Not necessarily.

The safest option depends on:

• Cause of pain

• Kidney function

• Liver function

• Other medical conditions

• Current medicines

• Severity of symptoms

• Pregnancy status

• Risk of bleeding or gastrointestinal complications

There is no universal rule that one painkiller is always best.

A clinician can select an appropriate medicine after assessing the individual patient.

What Medicine Is Used for Kidney Infection Pain?

If kidney infection is suspected, treating the infection is the priority.

Bacterial kidney infections are generally treated with antibiotics selected according to the clinical situation, urine testing and other relevant factors. Some patients may need oral treatment, while people who are seriously ill may require hospital care and intravenous antibiotics or fluids.

Pain and fever may also require supportive treatment.

Do not use leftover antibiotics or start an antibiotic without medical advice.

If a urinary blockage is responsible for or complicating the infection, a procedure may be required to restore drainage.

Can Medicine Remove the Cause of Kidney Stone Pain?

Pain medicine can provide temporary relief, but it does not necessarily remove the stone.

Treatment depends on the stone's:

• Size

• Location

• Composition

• Degree of obstruction

• Symptoms

• Effect on kidney function

Small stones may pass naturally in selected situations. Larger, obstructing or severely painful stones may require active treatment such as shock wave lithotripsy, ureteroscopy or percutaneous nephrolithotomy.

Therefore, repeated pain despite medication should not simply be managed with more painkillers.

Can Drinking Water Relieve Kidney Pain?

Adequate hydration can be important for people with kidney stones, but forcing large quantities of water is not a reliable pain treatment.

If a stone is blocking urine flow, excessive fluid intake will not physically remove the obstruction and may increase discomfort.

People with kidney failure, heart disease, fluid restrictions or certain urinary problems may also have individualized fluid requirements.

Follow the fluid advice provided by your healthcare professional.

What Tests May Be Needed for Kidney Pain?

The appropriate investigation depends on the symptoms.

Urine Examination

Urinalysis can help identify:

• Blood

• White blood cells

• Bacteria

• Crystals

• Other abnormalities

Blood Tests

Depending on the situation, doctors may check:

• Serum creatinine

• eGFR

• Urea

• Electrolytes

• Blood count

• Other relevant markers

Ultrasound

Ultrasound can help identify urinary obstruction, hydronephrosis and some kidney stones.

CT Scan

When a kidney stone is strongly suspected or detailed information is needed, imaging such as non-contrast CT may provide information about stone size, location and obstruction.

The choice of imaging depends on the clinical situation, age, pregnancy status and other factors.

When Does Kidney Pain Need More Than Medicine?

Pain may require treatment of the underlying problem when there is:

• A large kidney stone

• Persistent obstruction

• Repeated severe pain

• Infection

• Reduced kidney function

• Very little urine

• A stone unlikely to pass naturally

• Persistent vomiting or dehydration

Kidney stones that block urine flow or cause severe pain may require urgent treatment.

The goal is not simply to suppress pain but to protect kidney function and address the cause.

Kidney Pain With Fever: Why It Matters

Kidney pain accompanied by fever or chills requires particular attention.

A kidney infection can cause flank or back pain together with fever, chills and urinary symptoms.

If an infected urinary tract is also obstructed by a stone or another blockage, the situation can become serious.

Seek prompt medical care rather than relying on painkillers alone.

Can Kidney Pain Be Treated at Home?

Mild pain does not always mean that home treatment is appropriate.

Before taking medication, consider whether the pain is:

• New

• Severe

• Recurrent

• Associated with urinary symptoms

• Accompanied by fever

• Associated with vomiting

• Associated with blood in urine

A previously diagnosed small stone may sometimes be managed with a doctor-approved treatment plan, but unexplained kidney-region pain should be evaluated rather than repeatedly self-treated.

What Should You Avoid Taking Without Medical Advice?

Avoid starting medicines simply because they are advertised as kidney pain remedies.

Particular caution is needed with:

• Repeated NSAID use

• Combination painkillers

• Unprescribed antibiotics

• Herbal pain remedies

• “Kidney detox” products

• Medicines borrowed from another person

Herbal or natural products are not automatically safe for people with kidney disease.

When Is Kidney Pain an Emergency?

Seek urgent medical attention if kidney or flank pain occurs with:

• Fever or chills

• Very little or no urine

• Severe or rapidly worsening pain

• Persistent vomiting

• Confusion

• Severe weakness

• Blood in urine with worsening symptoms

• Severe breathlessness

• Known urinary obstruction

• A known kidney stone with signs of infection

Kidney stones can cause serious complications when they obstruct urine flow, and kidney infections can occasionally progress to severe systemic infection.

Kidney Pain 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-related pain and associated urinary or kidney-function abnormalities.

Depending on the patient's symptoms, evaluation may include:

• Detailed symptom assessment

• Kidney-function testing

• Urine examination

• Review of previous kidney stones

• Assessment of urinary obstruction

• Blood-pressure evaluation

• Ultrasound or other imaging review

• Medication assessment

• Evaluation of kidney infection

• Assessment of chronic kidney disease

• Coordination with a urologist when a stone procedure or other surgical treatment is required

The objective is to identify the reason for the pain before deciding on medication or another treatment.

Frequently Asked Questions

What is the best medicine for kidney pain?

There is no single best medicine for every type of kidney pain. Kidney stone pain, kidney infection and other causes require different approaches. NSAIDs or paracetamol may be considered in selected patients, but the safest choice depends on kidney function and other health factors.

What is the best painkiller for kidney stone pain?

NSAIDs are commonly used for renal colic when medically appropriate. However, they may be unsuitable for people with reduced kidney function, dehydration or certain other conditions. A healthcare professional should determine whether they are safe.

Can paracetamol be taken for kidney pain?

Paracetamol may be appropriate for some patients, depending on the cause of pain, liver health, other medicines and the recommended dose. Medical advice is preferable when kidney pain is unexplained or severe.

Can kidney infection pain be treated with painkillers alone?

No. Painkillers may help symptoms, but bacterial kidney infection generally requires appropriate antibiotic treatment. A urinary blockage may also require a procedure to restore drainage.

Does kidney pain always mean kidney stones?

No. Kidney infection, urinary obstruction, other kidney disorders and non-kidney conditions can produce similar pain.

When should I see a doctor for kidney pain?

Seek medical evaluation for new or persistent kidney-region pain, especially when accompanied by fever, urinary symptoms, blood in urine, vomiting, reduced urine output or known kidney disease.

Can a kidney stone be treated with medicine instead of surgery?

Some smaller stones may pass naturally with appropriate medical management. Larger or obstructing stones may require procedures such as ureteroscopy, shock wave lithotripsy or PCNL.

Conclusion

Searching for the best medicine for kidney pain is understandable when flank or back pain is severe. However, the safest treatment depends on what is causing the pain.

Kidney stones may require pain relief and, in some cases, stone-removal treatment. Kidney infections require treatment of the infection, while urinary obstruction may require restoration of urine drainage. People with chronic kidney disease or other health conditions may also need special consideration before taking common painkillers.

Do not repeatedly treat unexplained kidney pain with over-the-counter medicines without finding the cause. Appropriate urine tests, blood tests and imaging can help determine whether the pain is related to a stone, infection, obstruction or another condition.

For specialist evaluation of kidney pain and related kidney conditions, 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 constitute medical diagnosis, treatment or individualized medical advice. There is no universally safe or “best” medicine for kidney pain because treatment depends on the underlying cause, kidney function, age, pregnancy status, other medical conditions and current medicines. NSAIDs can be inappropriate for some people with chronic kidney disease, dehydration or other health conditions. Do not start antibiotics, prescription pain medicines, NSAIDs, supplements or herbal remedies without appropriate medical guidance. Seek urgent medical attention for kidney or flank pain accompanied by fever or chills, very little or no urine, persistent vomiting, severe or worsening pain, confusion, severe weakness, breathlessness or other signs of serious illness. Consult Dr. Sandip Prabhakar Bhurke or another qualified healthcare professional for an individualized evaluation.