The bone in the middle of the normal human chest cavity can be called the sternum, which is connected to the ribs on the left and right sides respectively, forming the sternocostal joint, which can play a role in protecting the lungs. If the patient has frequent chronic exertion, strain or stimulation by cold factors, the patient is prone to suffer from chondromalacia in the thoracic rib joint area. Patients feel significant localized pain with swelling, which in severe cases can affect normal activities. Symptomatic treatment can be taken, and the painful area can be treated with topical application of blood-activating and pain-relieving ointment, golden ointment or Wan Tong tendon and bone paste, along with physical therapy and baking electricity. If the pain is more severe, local closed injection can be used to cure the disease.