Hepatitis is a condition where the liver becomes inflamed, or swollen. This inflammation can be caused by different factors, such as viruses, alcohol, drugs, or toxins. When the liver is affected by hepatitis, it may not function properly. There are different types of hepatitis, including hepatitis A, B, C, and others. Each type can have different causes and ways of spreading. Hepatitis can range from mild to severe, and it's important to take preventive measures and seek medical advice if necessary.