The phenomenon of back pain after breaststroke exercise in daily life indicates that the patient’s swimming exercise is large and injures the lumbar muscle tissue, which will produce pain and swelling in the lumbar area and affect the patient’s bending activities. Patients should reduce the amount of activity or bed rest, take a hot bath, and can apply blood-activating and pain-relieving cream externally to the lumbar pain area, along with local physical therapy. If the patient’s pain level is heavy, local closed injection can be used, which can significantly relieve the pain situation. In addition, if the water temperature in the swimming pool is relatively low will make the lumbar region cool for a long time, will also occur in the lumbar muscle tension contraction spasm to produce increased pressure within the muscle, can stimulate the local muscle nerves will also have pain phenomenon.