Physical Changes in Boys Boys typically start puberty between ages 9 and 14. The first changes are enlargement of the testes and scrotum, followed by growth of the penis. Pubic, underarm, and facial hair appear. Testosterone causes the voice to deepen as the larynx grows and the vocal cords lengthen; boys may experience “voice cracking” during this time. Muscle mass increases and shoulders broaden. Boys also have a growth spurt, usually later than girls, and may begin producing sperm (spermarche), which enables reproduction. Like girls, boys experience increased sweat and oil production and possible acne.
Sweat glands become more active. You may sweat more, especially under the arms. Using deodorant or antiperspirant and bathing daily is necessary for good hygiene. Physical Changes in Boys Boys typically start puberty
A truly 1991 guide was distinguished by: Testosterone causes the voice to deepen as the
Be kind but clear. "I’m flattered, but I don't think of you that way" is a complete sentence. Like girls, boys experience increased sweat and oil
During puberty, a teenager’s world often shifts from family-centric to peer-centric. Relationships become the most important part of their daily life, often starting as mixed-gender group hangouts before evolving into "pairing off" for brief dating experiences.
