Right abdominal distension may be due to biliary diseases, appendicitis, hepatitis and other diseases. 1. Biliary diseases: usually due to biliary obstruction, biliary stasis and other conditions occurring as a result of secondary infection. Patients often appear to appear epigastric distension and pain, with the development of the disease will also appear paroxysmal colic and other symptoms, and patients can also be accompanied by chills, high fever, belching, nausea and other phenomena. 2. Appendicitis: right abdominal distension may also be related to appendicitis. Patients often appear right lower abdominal pain symptoms, mostly manifested as metastatic right lower abdominal pain, can also be accompanied by abdominal distension, diarrhea, anorexia and so on. Some patients may also have chills, fatigue, high fever and so on. 3. Hepatitis: usually due to viruses, parasites, alcohol, drugs, autoimmunity and other factors. Patients often have nausea, loss of appetite, pressure pain in the liver area and other symptoms, which can also be manifested as right abdominal distension. 4. Other: patients with right abdominal distension may also be allergic purpura nephritis, kidney stones and other kidney diseases or endometritis, cervicitis, pelvic inflammatory disease, uterine fibroids and other gynecological diseases. It is recommended that patients with symptoms of right abdominal distension and pain, actively consult a doctor for examination, and take targeted treatment after diagnosis of the disease.