There is a raised hard lump in the middle of the fossa of the heart, which may be caused by fibroma, epidermoid cyst, raphe and so on. 1. Fibroma: Usually the tumor-like tissue formed by abnormal proliferation of fibrous tissue under the skin can be hard and have certain activity. Usually benign lesions, if more than 2 centimeters, surgical treatment can be considered. 2. Epidermoid cysts: Generally, the growth of the hair follicles in the stratum corneum will be hindered after the patient’s skin is damaged. In the absence of infection patients should be operated as soon as possible to avoid infection and abscess formation. 3. Fenestra: This is a normal anatomical bony landmark of the human body, connected to the end of the sternum. It is more pronounced in thin people, and patients cannot move it when touched, usually without any tenderness or discomfort. There are many other causes of a raised hard lump in the center of the heart socket, so we recommend that patients seek timely medical attention to clarify the cause of the disease and then carry out regular treatment.