There are many reasons for 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 position, resulting in muscle spasm, causing shoulder pain, pay attention to rest and develop good posture habits can gradually recover; 2. Heavy physical labor: heavy physical labor leads to local muscle strain, which can also lead to shoulder pain. Shoulder joint pain and discomfort should be combined with rest and adequate rest. 3. Trauma: Shoulder pain and discomfort can occur when the shoulder is hit hard, such as falling and landing on the shoulder, which can cause joint injury. Pay attention to the cold and keep warm, you can cooperate with anti-inflammatory and analgesic drugs to relieve pain, and you can also be treated by heat compressing, physiotherapy, massage, local closure, etc.; 5, cervical spondylosis: degenerative lesions of the cervical spine compress the nerves and aggravate the pain in the neck and shoulder, which can cause radiated pain in the upper limbs. It can also be accompanied by muscle weakness, numbness, and numbness of the skin, but the symptoms are relieved after rest; 7, other: such as shoulder tumor, inflammation or heart disease, liver and gallbladder disease caused by the involvement of pain.