The male biological growth cycle can generally begin around the age of 12 and continue until the age of 30. However, due to individual differences, it is impossible to generalize. Generally speaking, males enter puberty around the age of 12 and begin to develop gradually, which can be manifested by the growth of beard on the face, protruding knot in the throat, thickening of voice, gradual thickening of armpit and pubic hair, and gradual development of penis and thickening of the penis. The desire for the opposite sex and the rebellious mentality are all indicators of male development, and the development of the skeleton will gradually stop before the age of 30. Male growth and development are affected by external factors, such as nutritional status, diseases, geographic location, family environment and heredity. During the period of male development, it is necessary to ensure sufficient rest time, do not overwork, or stay up late for a long time. Correctly establish sexual knowledge, do not produce a rebellious mentality. You can communicate with your parents more often to solve negative emotions in time. To summarize, if the male in the development process, the body abnormal discomfort, we recommend that the patient timely find out the cause of the disease.