Left bladder pain is considered to be related to frozen shoulder, cervical spondylosis, rotator cuff injury, myofasciitis and so on. 1. Frozen shoulder: aseptic inflammation and adhesion of muscles, joint capsule, synovium, ligaments and other tissues around the shoulder joint, causing pain in the shoulder joint and limitation of active and passive activities. 2. Cervical spondylosis: Cervical spine hyperplasia or herniated intervertebral disc compresses the nerves, which can be radiated to the left bladder causing pain and soreness, and can also be radiated to the upper limbs causing pain, numbness, and weakness in grasping. 3. Rotator cuff injury: Trauma to the shoulder joint or degeneration of the joint ligament tear, resulting in shoulder joint pain, active activities are limited. 4. Myofasciitis: Aseptic inflammation of the shoulder muscles such as supraspinatus and trapezius, localized adhesions, can lead to soreness and stiffness. The cause of left bladder soreness is complex, if it does not get better after resting, it is recommended to consult a doctor in time.