In most cases, pregnancy back pain is unbearable because of the laxity of joint ligaments, the uterus increases, the lumbar spine protrudes forward so that the back muscles are in a constant state of tension caused by, but also may be caused by over-nutrition leading to obesity. Uterine enlargement of the abdomen to the front bulge, this will lead to the normal curvature of the spine increased, to the front to maintain the balance of the body, thus causing significant pain in the waist. This can be relieved by massage, localized hot compresses and medication, do not stand for too long, bed rest if necessary. Obesity caused by over-nutrition during pregnancy will make the pregnant woman’s body overburdened, muscle long-term load, stimulate the nerves leading to back pain, the need for appropriate exercise to control weight. Also need to pay attention to usually maintain a good mood, pay attention to nutritional balance in the diet, to light, if the back pain has not been able to improve, it should be timely to seek medical attention to see if it is caused by other diseases.