I. Causes: The muscles of the low back are surrounded by fascia, and there is fatty tissue under the fascia, which can pass through the fascia to form a hernia. Nerve branches and blood vessels also penetrate the fascia. The muscle injury exudates and bleeds into the inflammatory adhesions between the muscle and fascia, moisture and cold, chronic muscle strain and fascial hypertrophy adhesions, neurovascular strangulation and pressure, muscle fascial stop strain and terminal disease lesions, acute lumbar back muscle injury is not cured in time to become chronic, and so on are the causes of symptoms. Symptoms and diagnosis: 1. Low back pain is heavy when waking up in the morning, but improves after activity, and the symptoms are lighter during the day and aggravated at night, and some of them also affect sleep. The symptoms are lighter during the day and worse at night, and some of them also affect sleep. The pain decreases or disappears when working or training, and the back pain at rest. 2. The pain changes with the weather, and the pain is aggravated by cold or rainy days. 3. It is often difficult to work by bending over, and the pain increases after bending over for a long time. 4. Low back pain is widespread, and the pain is indescribable, such as vague pain, swelling, soreness, and some are accompanied by heavy feeling. 3. Examination: Good range of spinal movement, forward bending lumbar pain, pressure pain, palpation may have muscle spasm, sometimes spastic muscle strips or hard nodes can be palpated, pressure pain is obvious, and even radiating pain. The pain disappears with local anesthetic closure. Full flexion pain, low back muscle resistance pain. Differential diagnosis: should be distinguished from disc herniation, ankylosing spondylitis, spinal tuberculosis, metastatic spinal lesions (such as tumors), osteoarthritic lesions. V. Treatment: 1, conservative treatment: control the amount of exercise, proper exercise of the lumbar back muscles, after exercise and at night before bedtime to do pulling exercises of the lumbar back muscles, that is, body forward flexion as far as possible to elongate the lumbar back muscles, which can relieve muscle spasm and improve blood circulation. 2, physical therapy: such as heat therapy, ultrashort wave, short wave, cupping, etc. Massage and acupuncture are effective. (1) Oral medicine: such as vitamin E, fotarine, pau taisong, fenbid, loxoprofen, etc. (2) Topical medication: Chinese herbal medicines to relieve pain and activate blood circulation are also effective. (3) Local injection: glucocorticoids or injections of hyaluronidase + lidocaine hydrochloride have rapid effects. 3.Surgical treatment. 4, minimally invasive muscle relaxation of lumbar muscle strain early exercise methods are: 1, pay attention to posture: sitting upright, that is, “sitting like a bell”. Correct poor work posture, such as bending too long, or too low ambulation, etc. 2, strengthen the activities: 30 minutes to move the cervical and lumbar spine, 60 minutes to get up and walk. 3, muscle exercise: the best fun activity is breaststroke. When out of the water, you need to lift your head and waist. The most economical method is “small swallow flying”. 4, sports or strenuous activities, to do a good preparation activities. 5.Severe pain can be protected by a waist brace. When the symptoms are reduced, it should be removed so as not to cause muscle atrophy.