Men with small hard lumps in the chest consider obesity, breast cancer, breast hyperplasia and other reasons, in the case of uncertainty, it is recommended to go to the breast surgery in time for examination and treatment. 1. Obesity: when the body is too obese, so that the body of disease, can appear in the chest symptoms of small hard lumps, it is recommended to go to the hospital in time for ultrasound to clarify the cause of the next step in the treatment program. 2. Breast cancer: when the breast epithelial cells in the chest proliferative out of control, and malignant changes, resulting in the appearance of clinical symptoms. The doctor suggests chemotherapy, endocrine, targeted or surgical treatment. 3. Breast hyperplasia: When the endocrine disorders in the body lead to breast hyperplasia, which manifests itself as the symptom of small hard lumps on the male chest. Men with small hard lumps in the chest should also consider chest wall diseases and benign breast tumors, etc. Generally, no special treatment is needed, but if pain occurs, it should be timely medical treatment.