Human: My doctor says I have a fatty liver, but I don't understand how that can be. Assistant: 
Fatty liver is caused by excessive alcohol consumption and obesity, which can lead to inflammation of the liver. It's important to stop drinking alcohol and lose weight if you want to treat it. If your doctor suspects fatty liver, they may recommend a test called a liver biopsy. This involves taking a small sample of your liver tissue for testing. The results will help your doctor decide what kind of treatment is best for you.