When the waist is over-rotated or the thigh is over-extended and abducted, it is easy to cause strain injury to one side of the psoas muscle, resulting in congestion, swelling and spasm of the psoas muscle, which can cause lumbago, abdominal pain, groin and perineal pain, and pain in the anterior medial thigh. The back pain of lumbar muscle strain can be prevented, how to prevent it in daily life? First of all, we need to strengthen the exercise, improve the physical quality. Especially for people who sit for years, the muscles of the lower back are weak and easily damaged. Therefore, there should be a purpose to strengthen the exercise of the low back muscles, such as doing some of the flexion, back extension, left and right lumbar side bending, gyration and supine, sit-up movements, so that the lumbar muscles developed and strong, strong ligaments, flexible joints, to reduce the chance of disease. Obese people should lose weight to reduce the burden on the waist. Secondly, we should pay attention to self-regulation, work and rest, avoid long-term fixed in a movement and mandatory bending action, such as standing for a long time can squat, squatting not only relax the waist and leg muscles to rest, but also reduce the consumption of physical energy. Then is to pay attention to a variety of postures in life, such as extracting heavy objects from the ground, should be bent knees squatting, to avoid bending to increase the burden; take heavy objects, the body as close as possible to the object, and make it close to the abdomen, legs slightly squat; to a high place to take things, not reach should not be forced; sleep should keep the spine bent. Avoid moisture and cold is also very important.