Hepatitis is inflammation of the liver that can be caused by viral infections such as hepatitis A, B, C, D, and E viruses, toxic substances like alcohol and drugs, or autoimmune disorders. There are several types of hepatitis with different causes, symptoms, modes of transmission, and treatments. Viral hepatitis spreads through contact with infected blood or bodily fluids, while toxic hepatitis results from ingesting toxic substances. Nursing care focuses on education to prevent transmission, promoting rest and good nutrition, and maintaining fluid and electrolyte balance.