There is a painful spherical hard lump inside the chest, there may be breast fibroid, breast hyperplasia, breast cancer, need to diagnose the lesion before treatment. 1. Breast fibroma: it is a common benign tumor of the breast, which can be single or multiple, and can develop in one breast or both breasts at the same time. Generally, round or ovoid nodules with a diameter of 1-3 centimeters can appear inside the breast, and some patients have large lesions, which may be more than 10 centimeters, and may have pain. 2. Breast Hyperplasia: Most common in women of childbearing age, the cause is related to endocrine disorders and elevated estrogen secretion levels. Patients may have round lumps inside the breasts, and female patients may have regular breast pain with menstruation, often accompanied by nipple discharge symptoms. 3. Breast cancer: It is a common malignant tumor of the breast. In the early stage of the disease, painless lumps in the breast are the main cause. As the lesion continues to develop, breast pain, breast skin indentation, nipple indentation, bloody nipple discharge, and enlarged lymph nodes may occur. In addition, other causes such as mastitis should be considered, and patients are advised to visit a breast surgeon to confirm the diagnosis of the lesion before treatment.