If the patient has pain in the left side of the chest when breathing, it may be caused by costochondritis. It is suggested that the patient can apply local fotarine ointment to the painful area and take oral Cilabox at the same time to help relieve the pain. If the patient can exclude costochondritis, then it may also be caused by cardiac neuropathy. It is suggested that the patient can take oral coronary Danshin drops and Xingyue capsule, and perform coronary CT examination to further exclude the existence of severe narrowing of coronary artery vessels.