Shoulder pain when swimming is usually caused by the following reasons: 1, before swimming warm-up is not enough, did not do the body basically slightly warmed up, so in the case of cold water will trigger frozen shoulder, shoulder joint wind, etc., so it will lead to shoulder pain; 2, too much force or improper force and the shoulder muscle stretching, strain or even rhabdomyolysis, which will also induce shoulder pain, swelling and pain; 3, such as the amount of exercise and exercise method is not correct, cold water and wind and cold into the body will have a certain amount of frozen shoulder, rheumatism, osteoarthritis and cervical spine wind, etc., will also cause shoulder pain after swimming.