Kidney stone symptoms

Sudden severe flank or back pain, nausea, and blood in the urine suggest a kidney stone. A provider can order imaging, prescribe pain and anti-nausea medications, and guide follow-up online.

Also called: passing a kidney stone · flank pain · blood in urine

Medically reviewed by Dr. Ikechukwu Ogbu, MD
MD · Board-Certified, Internal Medicine · Last reviewed

Go to the ER if you have:

  • Severe flank or back pain that comes in waves and won't let you sit still
  • Blood in the urine with fever or shaking chills
  • Vomiting and inability to keep fluids down
  • Only one kidney or a known transplant

What kidney stone symptoms could be

The most common causes a clinician considers. This isn't a diagnosis — it's the differential a provider works through with you.

Urinary tract infection (UTI)

Urinary tract infection (UTI) is one of the more common causes of kidney stone symptoms. A provider can confirm with the right history, exam, or labs — and start treatment the same day when appropriate.

Frequent urination

Frequent urination is one of the more common causes of kidney stone symptoms. A provider can confirm with the right history, exam, or labs — and start treatment the same day when appropriate.

Typical workup

What a clinician usually orders or asks about when someone presents with kidney stone symptoms.

  • Urinalysis (blood, infection), basic metabolic panel, calcium
  • Non-contrast CT is the imaging test of choice for suspected stones
  • 24-hour urine collection for recurrent stones to guide prevention

When to see a clinician

  • Symptoms have lasted more than a few days without improving, or keep coming back
  • You're not sure if this needs antibiotics, prescription treatment, or watchful waiting
  • You have a chronic condition (diabetes, heart disease, immunocompromised) that raises the stakes
  • You want a same-day plan without a trip to urgent care

Common questions