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

Font Size

Nonalcoholic Steatohepatitis (NASH) - Topic Overview

What is nonalcoholic steatohepatitis (NASH)?

Nonalcoholic steatohepatitis (NASH) is liver inflammation and damage caused by a buildup of fat in the liver. It is part of a group of conditions called nonalcoholic fatty liver disease. You may be told you have a "fatty liver." Many people have a buildup of fat in the liver, and for most people it causes no symptoms and no problems. But in some people, the fat causes inflammation and damages cells in the liver. Because of the damage, the liver doesn't work as well as it should.

NASH can get worse and cause scarring of the liver, which leads to cirrhosis. But the disease doesn't always get worse.

NASH is similar to the kind of liver disease that is caused by long-term, heavy drinking. But NASH occurs in people who don't abuse alcohol.

What causes NASH?

Experts don't know why some people with a buildup of fat in the liver get NASH and some don't. It could be that something in the environment triggers the inflammation in those people. Or maybe it runs in their families.

Things that put people at risk for NASH and for liver damage include:

Most people who have NASH are 40 to 50 years old and have one or more of the problems listed above. But NASH can happen in people who have none of these risk factors.

What are the symptoms?

You may have no symptoms in the early stages of NASH. Most people who have NASH feel fine and don't know that they have it.

As NASH progresses and liver damage gets worse, you may start to have symptoms such as:

It may take many years for NASH to become severe enough to cause symptoms.

    Next Article:

    Today on WebMD

    man holding his stomach
    Get the facts on common problems.
    blueberries in a palm
    Best and worst foods.
    woman shopping
    Learn what foods to avoid.
    fresh and dried plums
    Will it help constipation?
    top foods for probiotics
    couple eating at cafe
    sick child
    Woman blowing bubble gum

    Send yourself a link to download the app.

    Loading ...

    Please wait...

    This feature is temporarily unavailable. Please try again later.


    Now check your email account on your mobile phone to download your new app.

    Woman with crohns in pain
    Woman with stomach pain
    diet for diverticulitis
    what causes diarrhea