Commonly used clinical methods to identify hard lumps in the chest include breast palpation, color ultrasound, molybdenum target, magnetic resonance imaging and so on. 1. Breast palpation: Breast palpation can touch the hard lumps in the chest, and can initially determine the size, location, mobility, and adhesion to the skin of the hard lumps. 2. Color ultrasound: Color ultrasound is also a common clinical method to identify hard lumps in the chest. This imaging method can more directly measure the size of the chest lump, whether there is blood flow, the specific location and so on. 3. Molybdenum target: Molybdenum target has the advantage of good penetration, which is of great significance in diagnosing early breast cancer. Mammograms are not recommended for women under 40 years of age who do not have clear risk factors for breast cancer or who do not have abnormalities on clinical examination. Mammography is usually not performed during pregnancy. 4. Magnetic Resonance Imaging (MRI): The advantage of breast MRI lies in its high sensitivity, which can show multi-focal, multi-centered or bilateral breast cancer foci, as well as the relationship between the tumor and the chest wall and the metastasis of axillary lymph nodes, which can provide a more reliable basis for the development of surgical plan. The examination time is long and the cost is expensive. It is not the preferred method. Patients can choose the appropriate method to identify hard lumps in the chest with their specific situation.