The main symptom of sternitis is pain in the sternal region, which may be aggravated by compression or localized popping during chest expansion and stretching. Sternitis may be caused by sterile inflammation and localized infection, and the symptoms are different due to different causes of the disease. 1. Aseptic inflammation: Sternal inflammation may be a sterile inflammation, in which the patient experiences severe pain when taking a deep breath, coughing, or using upper extremity strength. In addition, the patient may also experience significant activity limitations such as reluctance to use the upper extremities to hold weight or expand the chest. The patient may also experience significant activity limitations due to pain when getting up and lying down. 2. Local infection: sternitis may also be caused by local infection, such as the occurrence of septic osteomyelitis of the sternum, there will be systemic clinical symptoms, such as high fever, redness of the skin near the sternum, swelling, fever, and even ulceration and pus. Patients with sternitis, it is recommended to go to the hospital in a timely manner, after clarifying the cause of the disease, according to the doctor’s guidance for standardized treatment.