The main clinical manifestations of brachial plexopathy include muscle weakness and atrophy of the shoulder girdle, upper limb, and thoracic back muscles, as well as numbness, pain, and hypesthesia in the sensory areas of the skin corresponding to the affected brachial plexus nerve branches. What are the symptoms that are easily confused with muscle weakness and muscle atrophy of shoulder girdle muscles, upper limbs and chest and back muscles? 1, lumbosacral strain lumbosacral strain is a common disease of the elderly, the essence of the 5th lumbar vertebrae and the 1st sacral vertebrae between the soft and hard tissues of the accumulation of injury, including lumbosacral ligaments, tendons, tendon membrane, fascia, intervertebral discs and vertebral joints of the strain. Accumulative injury of sacral muscles, ligaments and joint capsules. 2.Chronic lumbar muscle strain Chronic lumbar muscle strain or “lumbar dorsal musculoskeletal fasciitis”, “functional lumbago” and so on. Mainly refers to the lumbosacral muscles, fascia, ligaments and other soft tissues of chronic injury, resulting in local aseptic inflammation, thus causing diffuse pain in the lumbosacral region on one side or both sides, is one of the common diseases of chronic low back pain, often with occupation and work environment has a certain relationship. Patients should also pay attention to daily life, as far as possible, do not wear shoes with heels, to avoid aggravation of symptoms, rehabilitation exercises, usually pay attention to the best sleep hard board bed. 3, hip arthritis Hip arthritis refers to a class of osteoarthritic diseases caused by long-term weight-bearing imbalance of the hip joint surface due to the degeneration of the articular cartilage or bone structure changes. Its main manifestations are pain (radiating to the knee), swelling, joint effusion, cartilage wear and tear, bone spur hyperplasia, joint deformation, limited hip internal rotation and extension activities, inability to walk or even bedridden. 4, peripheral nerve disease peripheral nerve is the cranial nerve, spinal nerve, plexus, nerve cord, nerve trunk and peripheral nerve damage of the general term. It can be divided into two categories: neuralgia and neuropathy. Neuralgia only occurs in the distribution area of sensory nerves severe pain, the main quality of the nerve is not obvious changes, and its conduction function is also normal. Peripheral nerve degeneration caused by infection, poisoning, trauma, or metabolic disorders is neuropathy, commonly known as neuritis. According to the location of peripheral neuropathy, it is called cranial neuritis, radiculitis, ganglionitis, plexitis, neuritis and peripheral neuritis.