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Kidney Pain: 10 Causes with Symptoms

Kidney Pain

Typical kidney pain location

Typical kidney pain location

Kidneys Location

Kidney Pain Location

Kidneys are located at the bottom of the rib cage, about 3 inches away from the spine on each side (see the image on the right), but the pain from the kidneys can be expected over much larger area of the middle back and side of the body--in the flanks (see the image above).

Some kidney disorders are rarely associated with pain, for example chronic kidney failure.

Some kidney disorders cause no spontaneous pain, but pain can be provoked by a gentle hit to a kidney by the bottom of the fist.

Referred Kidney Pain

Pain from the chest and abdominal organs can radiate to distant parts of the body.

Pain from the chest and abdominal organs can radiate to distant parts of the body.

Pain from the kidneys can radiate to a wide area of the middle and lower back and abdomen, groin and thighs (see the light brown area in the picture above). This is so called referred pain. Urinary stones in the kidneys or ureters are the most common cause of referred kidney pain.

Symptoms and Signs Associated With Kidney Pain

Symptoms of kidney disorders typically associated with kidney pain:

  • Nausea or vomiting
  • Cloudy or foamy urine or smelly urine
  • Passing a stone in urine
  • Frequent urination
  • Excessive urination (increased total daily amount of urine)
  • Blood in urine
  • Anorexia
  • Fever or chills
  • A lump in the flank or in upper abdomen
  • Generalized itch or rash
  • Generalized body swelling

Common Causes of Kidney Pain

  1. Kidney stones
  2. Kidney inflammation (nephritis)
  3. Kidney infection (pyelonephritis)
  4. Obstruction of the ureteropelvic junction (UPJ)
  5. Kidney enlargement (hydronephrosis)
  6. Loin pain hematuria syndrome (LPHS)
  7. IgA nephropathy
  8. Kidney tumor

Kidney Stone Pain

Typical distribution of kidney stone pain

Typical distribution of kidney stone pain

1. Kidney Stones

Kidney stones are formed in the kidneys but they usually cause pain only when they lodge in the ureter on the right or left side.

Pain from the kidney stone presents as a severe pain in the flank that can last from several minutes to few hours and can radiate down by one side of the lower back or abdomen into the groin and genitalia.

The pain can recur in intervals of different lengths -- from days to months. A small stone can be sometimes excreted with the urine.

Other symptoms may include nausea, vomiting, frequent urination, cloudy urine and blood in urine.

Uncomplicated kidney stones are usually not associated with fever.

Over the counter painkillers, such as aspirin or paracetamol can help relieve the pain.

2. Kidney Inflammation

The cause of kidney inflammation (glomerulonephritis or interstitial nephritis) is often not known. Symptoms may include:

  • Acute or chronic, mild, dull pain in one or both kidneys with a waxing an waning course (the pain can be absent)
  • Foamy urine
  • Swelling around the ankles and around the eyes or generalized swelling
  • Low-grade fever

Treatment may require steroids or other anti-inflammatory drugs.

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3. IgA Nephropathy

IgA nephropathy or Berger's disease is a type of kidney inflammation.


  • Brown, cola- or tea-colored urine, usually triggered by a respiratory or gastrointestinal infection
  • Spasms or dull pain in both flanks
  • Symptoms may last for up to 3 days.

4. Kidney infection

Kidney infection (pyelonephritis) usually arises from the infection of the lower urinary tract (urethra or bladder).


  • Pain in one or both flanks
  • High fever and chills
  • Nausea
  • Burning urination
  • Cloudy and smelly urine
  • Blood in urine

Treatment is by antibiotics.

5. Obstruction of the ureteropelvic pelvic junction

Obstruction of the ureteropelvic junction (UPJ) refers to narrowing of one or both ureters at the point where they leave the kidneys.

The main symptoms is sudden pain in one or both flanks after drinking large amounts of fluid.

Prevention is by avoiding drinking large amounts of fluids in a short time. Usually no treatment is required.

6. Kidney Enlargement

Kidney enlargement (hydronephrosis) can be caused by the obstruction of one or both ureters, usually by a kidney stone or tumor. The enlargement can develop quickly, within few days, or gradually over several moths.

Symptoms include a lump and dull pain over the kidney on one or both sides.

A sudden kidney enlargement is a medical emergency. Treatment may involve endoscopy or surgery.

7. Loin Pain Hematuria Syndrome

Loin pain hematuria syndrome is a rare kidney disorder caused by infection, hormonal changes or use of oral contraceptives, mainly in young women.

Symptoms may include:

  • Constant or throbbing pain in one or both flanks, aggravated by exercise
  • Blood in the urine
  • Fever
  • Symptoms may last from hours to months and often recur.

Polycystic Kidney Disease

Polycystic kidney disease is a hereditary disease with cysts in both kidneys.


  • Middle back or upper abdominal pain
  • A palpable lump in the upper abdomen on both sides
  • Increased blood pressure
  • Occasional blood in urine
  • Frequent urinary infections

9. Vasculitis

Inflammation of the arteries (vasculitis) can also affects kidneys. This can happen in diseases, such as polyarteritis nodosa or Henoch-Schönlein purpura.


  • Bilateral kidney pain
  • Skin rash
  • Low-grade fever

10. Kidney Tumor

Kidney tumors (benign or malign) can develop in any life period.

Symptoms may include:

  • Slowly progressing pain in the kidney area, usually only on one side
  • Blood in urine
  • Poor appetite
  • Unintentional weigh loss
  • A lump in the kidney area

Treatment is by chemotherapy or surgery.

Kidney Stone vs Infection vs Inflammation

Kidney StoneKidney InfectionKidney Inflammation

Sudden, severe pain in the flank radiating to groin

Throbbing pain in the flank

Sometimes, dull pain in the flank

No fever

High fever

No or low-grade fever

Clear urine

Cloudy and smelly urine

Sometimes, foamy urine


Nausea, vomiting

Sometimes, rash

Kidney Pain and Other Causes of Lower Back Pain

The following conditions can mimic kidney pain:

  • Muscle strain in the lower back
  • Fibromyalgia
  • Peptic ulcer
  • Appendicitis
  • Disorders of the spine (ankylosing spondylitis, osteoporosis), spinal nerves (pinched nerve, shingles), spleen, liver (hepatitis), pancreas (pancreatitis), gallbladder (gallstones), colon (trapped gas), abdominal aorta (aneurysm), lungs (pneumonia), lung membrane (pleurisy)

Most of the above conditions do not cause any acute changes in the frequency of urination or in urine color.

Details about how to differ between the kidney pain and other cause of lower back pain


For each question, choose the best answer. The answer key is below.

  1. High fever is a typical symptom of which kidney disorder?
    • Kidney stones
    • Kidney inflammation
    • Kidney infection
    • Kidney tumor
  2. Drinking water can trigger pain in which kidney disorder?
    • Kidney stones
    • Kidney infection
    • Obstruction of ureteropelvic junction (UPJ)
    • Kidney tumor

Answer Key

  1. Kidney infection
  2. Obstruction of ureteropelvic junction (UPJ)

Kidney Stones Poll

Treatment of Kidney Pain

In most cases, it is best to discuss treatment options of kidney pain with your doctor.

It is NOT recommended that you self-treat kidney pain using the following methods:

  • Increasing or decreasing the volume of water you drink
  • Drinking cranberry juice
  • Diuretics, antibiotics, opiate analgesics or other prescription drugs unless prescribed by your doctor
  • Vitamin or mineral supplements, unless prescribed
  • "Detox diets"
  • Probiotics
  • Herbal extracts
  • Acupuncture
  • Homeopathy


It is a doctor who can give you a diagnosis of your kidney problem. It can be very helpful for a doctor if you tell him or her your exact pain location, the time of its onset, pain triggers and relievers, eventual other symptoms and other health issues you had before.

This article is not meant to be a self-diagnosis instruction, but a guide that can help you recognize if your pain arises from the kidneys. In most cases, it is best to discuss about kidney pain with a doctor.

More Kidney Pain Details

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