Boys are generally at the age of 13-14 years old when they are in the voice change period, the laryngeal nodes protrude, the voice becomes lower, thicker and brighter, after the voice change period will not affect the height growth of boys. Height is more influenced by genetic factors, boys are relatively late in developing height, 15-16 years old for the rapid growth period, to 20 to 24 years old will stop growing, when the long bones and spinal column bone ossification height will stop growing. Usually pay attention to strengthen nutrition, you can eat eggs, pure milk, etc., to supplement protein, appropriate exercise can increase height.