Hard lumps in male breasts should be determined according to the cause of the disease to determine whether they will subside naturally, for example, physiological gynecomastia may disappear after puberty, soft tissue injury caused by trauma may also subside naturally, while cirrhosis of the liver, testicular cancer and other diseases usually do not subside naturally. 1. Physiological gynecomastia: It can be seen in men during puberty or old age, usually due to the imbalance of the ratio of estrogen and androgen, and can subside naturally after about 1~2 years, usually without treatment. 2. Soft tissue injury caused by trauma: with the gradual healing of the local injury, the local hard lumps may gradually subside. 2. Cirrhosis of the liver: Cirrhosis of the liver will lead to liver dysfunction, which will affect the inactivation of estrogen, thus leading to the development of male mammary glands. Cirrhosis of the liver should be treated in time, and can be treated with medicines such as silymarin. 3. Testicular cancer: Testicular cancer will lead to the decrease of androgen secretion, which will lead to gynecomastia and breast nodules, and breast development can be treated by surgery for testicular cancer. Hard lumps in male breast should seek medical treatment in time to receive professional examination and treatment.