Cholecystitis may occur due to inflammation and stimulation of the right upper abdomen and right back, and duodenal ulcer may also occur due to stimulation of gastric acid and other stimuli. Cholecystitis, due to inflammatory stimulation and impaired bile excretion, usually presents with persistent distension and pain in the right upper abdomen and right back, which is aggravated by eating greasy food and can radiate to the right back, and may be accompanied by nausea, jaundice and other symptoms. Duodenal ulcer due to gastric acid and other substances to stimulate the damaged ulcer surface, causing the gastrointestinal tract smooth muscle spasm, there will be a right abdominal distension and pain, and sometimes can radiate to other parts of the back and so on. Stomach acid is secreted during fasting and comes into direct contact with the ulcer surface, usually with preprandial pain. Right upper abdomen and right back distension and pain, may also be caused by other diseases, can be under the guidance of the doctor combined with related discomfort symptoms, as well as ultrasound, CT and other tests, timely identification of the cause and treatment.