There are many causes of shoulder pain, such as poor posture, heavy physical labor, frozen shoulder, cervical spondylosis, trauma, myofasciitis, etc. 1, poor posture: usually due to incorrect posture or long-term in the same posture, resulting in muscle spasm, causing shoulder pain, pay attention to rest and develop good posture habits can be gradually restored; 2, heavy physical labor: heavy physical labor leads to local muscle strain, can also appear shoulder joint pain discomfort, should be combined with rest, sufficient rest; 3, trauma: shoulder by a violent impact, such as accidentally fallen shoulder landing, etc., resulting in joint injury, can also appear shoulder pain, the affected side of the shoulder, the shoulder pain. If the shoulder and upper limb are not relieved after rest, you should seek medical attention to avoid delaying the condition. Shoulder pain can be aggravated by cold and can be manifested as shoulder pain, so pay attention to the cold and keep warm. 6.Myofasciitis: after strain or cold, shoulder pain will be significantly aggravated, and may be accompanied by muscle weakness, numbness, and skin numbness, but the symptoms will be reduced after rest; 7.Other: such as shoulder tumor, inflammation or heart disease, liver and gallbladder disease caused by entrapment pain.