Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Kidney Stones Health Center

Kidney Stones Overview

Kidney stones are small "pebbles" of salt and mineral in the urine. The most common symptom is severe pain. Most stones pass on their own, but medical procedures are used to remove some kidney stones.

Latest Headlines
But don't stop on your own if doctor recommended them, experts say

What Happens

A kidney stone begins as a tiny piece of crystal in the kidney. When the urine leaves the kidney, it may carry the crystal out, or the crystal may stay in the kidney. If the crystal stays in the kidney, over time more small crystals join it and form a larger kidney stone.

Most stones leave the kidney and travel through the urinary tractcamera.gif when they are still small enough to pass easily out of the body. No treatment is needed for these stones.

Today on WebMD

Kidney Stone
5 Signs You Might Have A Kidney Stone
Lots Of Water Part Of Kidney Stone Treatment
Research To Prevent Kidney Stones Under Way

Thumbnails Kids Get Kidney Stones Too
Food And Drink To Keep Away Kidney Stones
What Is A Kidney Stone Made Of
7 wonders of Water Slideshow