Liver cancer, or hepatocellular carcinoma, originates in the liver cells and is often associated with chronic liver diseases such as cirrhosis, hepatitis B or C infection, alcohol abuse, or fatty liver disease. Symptoms include abdominal pain, swelling, jaundice, weight loss, and nausea. Diagnosis involves imaging tests, blood tests, and sometimes biopsy. Treatment options depend on the cancer's stage, size, and location, and may include surgery, liver transplantation, chemotherapy, radiation therapy, or targeted therapy. Prevention strategies include hepatitis vaccination, limiting alcohol consumption, maintaining a healthy weight, and regular screening for liver disease in high-risk individuals. Early detection improves treatment outcomes.