Factors affecting male growth mainly include intrinsic and extrinsic factors. Intrinsic factors include heredity and endocrine function; extrinsic factors include nutritional intake and exercise. 1. Intrinsic factors: genetics determines various hereditary traits in the developmental process, thus there are obvious physical differences among different races, families and individuals. Endocrine glands play an important role in regulating growth and development, with the pituitary gland, thyroid gland and gonads playing a particularly prominent role. 2. External factors: Nutrition Nutrition is the most important influence on growth and development. The living environment and geographical conditions (mountains, plains, hills, deserts, etc.), climatic conditions and living habits also have a certain impact on height development. It is recommended that adolescents need to eat a diversified diet with balanced nutrition, exercise more, and ensure sufficient and good sleep. If you find abnormal height, consult a doctor in time and follow the doctor’s advice.