Hepatitis is an inflammation of the liver. Inflammation causes soreness and swelling. Hepatitis can be caused by many things. Drinking too much alcohol, abusing drugs and taking some medicines can cause hepatitis.
Many viruses can cause hepatitis, too.
There are 2 main kinds of hepatitis, acute hepatitis and chronic hepatitis. When a person has hepatitis, the liver may become inflamed very suddenly. This is called acute hepatitis. If you have acute hepatitis, you might have nausea, vomiting, fever and body aches. Or you may not have any symptoms.