Lumbar depression may be caused by physiological factors, or may be caused by pathological factors such as scoliosis, anterior pelvic tilt, trauma and other factors, such as causing discomfort, it is recommended to go to the hospital for a clear diagnosis. 1. Physiological factors: lumbar depression may be a physiological phenomenon, because the human lumbar spine has a normal physiological curvature of forward convexity, the back of the waist will have a normal depression of the physiological curvature of the waist, there is no need for treatment if there is no discomfort. 2. Scoliosis: Scoliosis is characterized by the curvature of the spinal segments to the side of the body, with one side of the lumbar depression, which can be caused by congenital factors, neuromuscular diseases, etc. It can be corrected by exercise and support, and requires surgical treatment if necessary. 3. Anterior pelvic tilt: due to long-term standing and sitting posture is not correct, may cause physiological curvature changes or anterior pelvic tilt, at this time the depression is more obvious, can be accompanied by lumbago, lumbago symptoms, it is recommended to consult a doctor, through the correction of posture to restore. 4. Trauma: after trauma or surgery to the waist, there may be local skin scarring and contracture, which may also cause local depression. There are more causes of lumbar depression, so it is recommended to go to the hospital to clarify the cause of the disease for targeted treatment.