A woman sleeping with back pain may be caused by the following reasons: 1. The mattress may be too soft or too hard, resulting in the muscles of the low back, which must be contracted to maintain the correct position for a long time, and local strain pain, generally after getting up, the symptoms can soon be relieved, if the root cause is to be removed, the mattress must be replaced. 2. The chronic aseptic inflammation of the low back, or muscle strain, often do heavy physical activities during the day, such as the low back often have to force to move things, lifting things, or use the low back to do strenuous exercise is more common. 3, may be accidentally cold and flu, virus invasion of the muscles of the low back, resulting in local muscle soreness, weakness and other feelings, generally accompanied by Upper respiratory tract symptoms, such as coughing, coughing phlegm, even fever, sore throat and other symptoms.