Male breast hyperplasia can not be practiced into pectoral muscles, breast hyperplasia refers to glandular hyperplasia, while the main component of muscle is myocytes. Male breast enlargement disease, can be caused by various reasons, such as pubertal breast enlargement, due to liver hypogonadism, due to testicular disease and so on. The main location affected by the disease is the mammary gland, a glandular tissue located in the breast, whose main function is to secrete milk, and the rest of the breast is composed of adipose tissue, connective tissue, and skin. The composition of the pectoral muscle includes pectoralis major, pectoralis minor, serratus anterior, intercostal muscles, intercostal muscles, etc. The muscle is mainly composed of myocytes, and you can make the pectoral muscle fibers thicker by exercising and strengthening the nutrition, but the muscle and the breast tissue are not convertible to each other. Male breast enlargement need to solve the primary disease, timely medical treatment, follow the doctor’s instructions to receive treatment.