The presence of pain on the left side of the sternum is not excluded from costochondritis. It is also a sterile inflammatory disease that is triggered after exertion and is manifested by localized pain and soreness, while chest radiographs are usually negative. You can choose physical therapy such as local heat, or oral pain medication application Nimesulide dispersible tablets, severe pain, you can also carry out local closure treatment can improve the condition. Some patients may also have soft tissue contusions of the chest wall secondary to trauma, which may also manifest as localized pain, and may also be accompanied by restricted deep breathing, so attention should be paid to rest and not strain, and topical fotarine can be used. During the treatment period, it is also possible to take appropriate oral pain medication, apply aminoglutethimide tablets and pay attention to increase the diet and nutrition, and supplement vitamin-rich food.