Sleeping in the middle of the night arm pain may have the following reasons: First, cervical spondylosis, when cervical spondylosis compression of the nerve root, can be in the middle of the night due to sleeping posture is not correct, and lead to nerve root compression is serious, the symptoms of arm pain in the middle of the night, this time to carry out the cervical spine of the X-ray film and CT, MRI, to carry out the early diagnosis and treatment; Second, myofasciitis, myofasciitis patients are often to scapula Secondly, myofasciitis, myofasciitis patients often take scapular medial pain as the first symptom, which can be radiated to the upper limbs on the same side, and the arm pain is often serious at night when sleeping under pressure or when catching a cold or exerting oneself, and then we should carry out the relevant examination and checkups and exclude other diseases to carry out early diagnosis and treatment; thirdly, peripheral nerve compression, if peripheral nerves are compressed in their routes, the symptom of arm pain in the middle of the night will appear, and then relevant examination and electromyographic examination should be carried out to check the peripheral nerves. Third, peripheral nerve compression, if the peripheral nerve is compressed in its course, the symptoms of arm pain in the middle of the night can occur, then we should carry out the relevant examination and electromyography for early diagnosis and treatment.