Faint pain in the lumbar region may be related to the following causes: 1. There may be old injuries. This condition is most common in clinical practice, such as a compression fracture of the lumbar spine here in the past or an acute lumbar sprain, which may leave a vague pain in the lumbar region after recovery. This is especially obvious when the patient is tired or when there is a change in the weather. 2, there may be lumbar muscle strain. This condition is often seen in patients who need to sit and stand for a long time. In this case, it will lead to long-term tension in the lumbar muscles, and then produce strain injury. At this time the patient will often feel a vague pain in the lumbar region, and the pain is distributed on both sides of the lumbar region. 3, may be due to osteoporosis, often seen in the elderly. This kind of patients once the osteoporosis, often have vague pain in the waist, and accompanied by the whole body without obvious triggering factors weakness. 4, may also be due to overwork caused by. There are many forms of overworking the lower back. For example, if the patient has long term heavy weight bearing or frequent room strain, it will lead to a vague pain in the lower back.