The right side of the back pain in six months of pregnancy with a full stomach may be due to hormonal changes, uterine enlargement, gallbladder disease, stomach disease and other reasons. 1. Hormonal changes: six months pregnant body hormone levels will change, easy to make the joint ligament laxity, low back muscles may appear pain discomfort, usually sit in a bad posture may show the right side of the back pain. 2. Uterine enlargement: the uterus gradually increases in six months of pregnancy, the uterus protrudes forward so that the center of gravity of the body shifts backward, the lumbar spine protrudes forward, the entire back muscle is in a constant state of tension, there will be a back, lumbar pain and discomfort, and there will be a right back pain after eating a full meal. 3. gallbladder disease: six months pregnant right back pain on a full stomach may be caused by gallbladder disease, such as gallbladder stones, cholecystitis, stimulation by stones or inflammation will cause pain under the right shoulder blade. 4. gastric disease: six months pregnant with gastric ulcer patients, such as penetrating gastric ulcer, after eating a full meal stomach acid increase, stimulate the ulcer surface may cause back pain. Six months pregnant with a full meal on the right side of the back pain causes more, serious cases are recommended to seek timely medical attention.