The 11 and a half year old boy has pubic hair and voice change have appeared at the same time, there are not at the same time, which is related to the individual physique.
Boys in 11 to 14 years old, will enter puberty, at this time the body’s androgen secretion will increase, there will be secondary sexual characteristics, pubic hair and voice change is the specific manifestation of secondary sexual characteristics.
Most people experience voice change first, while some experience pubic hair first. However, whether pubic hair or voice change occurs first, it is a normal phenomenon.
During puberty, you should pay special attention to rest, avoid overwork, and avoid masturbation. Never hiss when speaking, so as not to damage the vocal cords. To eat more vegetables and fruits, avoid spicy and other stimulating food.