Shoulder soreness after swimming may be related to excessive exercise, cold stimulation and adhesive capsulitis of the shoulder joint. 1. Excessive exercise: If the patient has no exercise habit, a one-time swimming time is too long, lactic acid accumulation will occur, coupled with the myofascial fatigue of the shoulder joint or even injury and other factors will cause shoulder pain. 2. Cold stimulation: the water temperature in the swimming pool is too low, and prolonged immersion in a cold pool will lead to poor local blood circulation in the joints and slow down the flow of fluid in the joint capsule, which may induce the symptoms of shoulder pain. 3. Adhesive shoulder bursitis, also known as frozen shoulder, is a chronic inflammatory disease under the synovial membrane of the joint capsule, which may trigger the onset of frozen shoulder pain after swimming. If you have the symptom of shoulder pain after swimming, you need to go to the hospital in time to clarify the cause, and the doctor will issue an individualized treatment plan according to the situation, so as to avoid delaying the condition.