There are many different symptoms that a person can have, which may indicate that they have a kidney stone.

Kidney stone symptoms include:

  • Sharp pain in the abdomen below the ribcage on side, back, and possibly the groin area
  • Frequent urination or having urge to urinate
  • Burning sensation or pain while urinating
  • Color change in urine; blood, darker brown, cloudy or foul-smelling
  • Chills or fever
  • Nausea and vomiting

One of the main factors that determines the time it takes to pass a kidney stone is its size. Generally, smaller stones have a higher likelihood of passing through the urine faster than larger stones.

  • Small kidney stones are considered 1-5 millimeters (mm) taking on average 8 to 12 days to pass. Smaller stones are most likely the fastest to pass and exit through the urine.
  • Large kidney stones are considered greater than 5 mm, taking on average 22 days or longer to pass. Larger stones will have less of a chance of exiting the body and will take much longer than smaller stones.

The most common kidney stone signs and symptoms are like many other conditions or diseases. As a result, these kidney stone symptoms are often misdiagnosed or mistaken as other illness.

Conditions that can be mistaken for kidney stones, sharing similar symptoms:

  • Appendicitis or lower back pain
  • Urinary tract infection (UTI)
  • Stomach flu or virus

Certain kidney stone symptoms and changes in symptoms may indicate the need to consult with a primary care provider or visit the emergency room.

You should go to the hospital or seek medical attention for these kidney stone symptoms:

  • A sharp pain in the side, back or lower abdomen.
  • Pain when urinating.
  • Blood in the urine (hematuria).
  • Fever or chills.
  • Nausea and vomiting.
  • Experiencing immense pain, becoming unbearable.