Costochondritis is categorized as non-infectious costochondritis and infectious costochondritis depending on the cause. It shows symptoms such as pain and localized lumps. 1. Non-infectious costochondritis: It is commonly found in the 2nd or 3rd rib next to the sternum, and can also occur in the rib arch. Early patients feel chest pain, and after a few days, localized swelling or painful lumps may appear, with obvious pressure pain in some areas. Sometimes the pain may radiate to the back of the shoulder, as well as the upper arm and armpit. 2. Infectious costochondritis: mostly caused by primary or secondary infection of costochondral inflammation, local redness and swelling, accompanied by fever. When the patient coughs, chest pulling pain will be formed. If the local soft tissue is infected with necrosis, it can cause local abscess, and local sinus tract will appear if the abscess breaks down. When the above symptoms occur, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions to carry out relevant examinations, with the help of the doctor to clarify the cause, and to carry out targeted treatment or therapy.