Chondromalacia should be registered with the Department of Thoracic Surgery or Orthopedics. Chondromalacia is clinically categorized into non-specific chondromalacia and infectious chondromalacia, which mostly occurs in the cartilage of 2-5 ribs. It is characterized by localized elevation and enlargement, accompanied by pain when breathing deeply or coughing. The etiology of non-specific costochondritis is not yet clear, and the possible causes include: upper respiratory tract viral infection; chronic strain of thoracic rib joint ligaments; injury or strain of thoracic rib joint ligaments leading to change of force; immune or endocrine nutritional disorders of costochondral bone; as well as severe impact to the chest, lifting heavy objects or strenuous exercise, and violent coughing and sneezing. Infectious costochondritis is usually considered as a result of bacterial hematogenous infections and trauma and cardiothoracic surgery. For example, Mycobacterium tuberculosis, Mycobacterium typhi, and Mycobacterium paratyphi may cause infectious chondrocostitis. Generally speaking, the soft rib osteoarthritis is mostly treated conservatively, and it is recommended to go to the hospital to hang up the thoracic surgery department or orthopedics department, and the professional doctor will make the treatment plan after clear diagnosis.