Gynecomastia is usually caused by abnormal hormone levels, but it can also be caused by diseases such as breast hyperplasia and breast tumors. It can be treated with lifestyle changes, medication, and if necessary, surgery. Most cases of gynecomastia are caused by the increase or decrease of estrogen in the body. Most patients can strengthen exercise, ensure sufficient rest, do not stay up late, eat a light and nutritious diet, and have a good lifestyle that is conducive to the regulation of hormone levels. If the effect of changing daily life style is not good, the patient can also follow the doctor’s instructions to take clomiphene, tamoxifen and other anti-estrogen drugs, the use of drugs should pay attention to the side effects of the drug, if there is discomfort after the use of medication, to consult a doctor in time to deal with. In addition, breast hyperplasia, breast lipoma, breast tumor, endocrine diseases, and taking certain drugs such as (spironolactone), liver disease caused by the need for targeted treatment. It is recommended that patients seek timely medical examination and standardized treatment under the guidance of the doctor.