Kidney stone pain is usually felt in the side and back, just below the ribs, and can move toward the lower belly and groin as the stone travels.

Where kidney stone pain usually starts

  • Most people feel the first pain in the flank – the area on either side of your lower back, just below the rib cage.
  • It can feel like very intense, sharp, or cramping waves of pain that come and go, rather than a constant dull ache.

Think of it as pain that seems “deeper” than muscle pain and often comes in sudden, severe attacks.

How the pain moves

As the stone moves down from the kidney into the ureter (the tube to the bladder), the pain can shift:

  • From the flank around to the side and front of the lower abdomen.
  • Down into the groin area; in men it can radiate into the testicle, and in women it can be felt in the labia or vaginal area.
  • It may change location and intensity over time, which is typical for stone “colic.”

Other symptoms that often go with the pain

  • Burning when you pee or needing to pee very often, but often passing only small amounts.
  • Urine that looks pink, red, or brown from blood.
  • Nausea and vomiting during bad pain episodes.

Kidney stone pain vs. regular back pain

  • Kidney stone pain is usually much more severe, often comes in waves, and may move from back to belly to groin.
  • Typical muscle back pain tends to stay in one spot and is linked to movement or position, rather than urination.

When to seek urgent help

You should get urgent medical care (ER or emergency doctor) if:

  1. Pain is so strong you can’t get comfortable, stand, or sleep.
  1. You have pain plus fever or chills (could mean infection, which is an emergency).
  1. You see blood in your urine or can’t pee at all.

If you’re currently having strong flank/side pain that’s moving toward the groin, especially with urinary changes, contact a doctor or urgent care now to be safe. This information is general and cannot replace an in‑person medical evaluation. Information gathered from public forums or data available on the internet and portrayed here.