Arm pain in the middle of the night is more complicated, common causes are over fatigue, improper sleeping posture, cold, disease and so on. In the case of arm pain in the middle of the night, you can go to the hospital, for the cause of the treatment, to help arm pain recovery. 1, excessive fatigue: daytime exercise is too much, the arm muscles have a slight strain, to the middle of the night, the arm is not fully recovered, so the arm in the middle of the night is very painful symptoms; 2, improper sleeping position: sleep so that one side of the arm under the body, affecting the blood circulation of the upper limbs, can also trigger the arm in the middle of the night is very painful; 3, cold: sleep without paying attention to the arm area warm, triggering the arm muscles, fascia, cold, and other diseases. Very painful; 3, cold: sleep without paying attention to the arm parts of the warmth, triggering arm muscles, fascia, ligament spasm, will also cause arm pain in the middle of the night; 4, disease: the organism has cervical spondylosis, frozen shoulder, myofasciitis and other diseases, such as cervical spondylosis, resulting in cervical spine lesions compression of the nerve roots of the upper limbs, will also appear in the middle of the night arm very painful symptoms; 5, other: such as dermatomyositis, local trauma and other reasons, in daytime Activity when the feeling is not obvious, in the sleep of the quiet state, may show more heavy, appear arm in the middle of the night is very painful. Occasionally arm pain in the middle of the night, can be adjusted by adjusting the sleep position, adjust the pillow height and other methods to help improve, often arm pain in the middle of the night, under the guidance of a physician, follow the doctor’s instructions to use drugs, physical therapy and other ways to relieve pain.