For Boys: What to Expect During Puberty

Puberty is a transformative phase in a boy’s life, however it can be a bewildering time with many changes. For boys, it typically starts between the ages of 9 and 14 and brings changes, both physically and emotionally. Every individual experiences puberty on a unique timetable, but here’s an overview of what boys can expect during these developmental years.

Bodily Changes 

Before puberty, boys and girls have similar physical strength. However, during and after middle adolescence, boys experience a significant increase in muscle mass and growth. Early puberty may make boys appear chubby or gangly, with long arms and legs compared to their trunks. A growth spurt typically occurs later in puberty, with rapid development of the trunk and legs.

One of the earliest signs of puberty is the enlargement of the testicles and scrotal sac, which nearly double in size. As the testicles grow, the scrotal skin darkens, enlarges, thins, and hangs lower from the body, becoming dotted with tiny bumps (hair follicles). It’s common for one testicle, typically the left, to hang lower than the other. 

Additionally, the penis grows first in length and later in width, with adult size typically reached between ages 13 and 18. About one in three boys develop small, harmless bumps called penile pearly papules around the crown of the penis. These are normal and not indicative of a sexually transmitted disease. Reassure your son that these bumps require no treatment and are barely noticeable.

Wet Dreams and Involuntary Erections

Boys become capable of reproduction after their first ejaculation, which usually occurs about a year after testicular growth begins. The testicles produce sperm and testosterone, while other glands contribute fluids to form semen. Each ejaculation contains hundreds of millions of sperm.

Boys may experience nocturnal emissions (“wet dreams”) during puberty, which can occur with or without sexually oriented dreams. Parents should explain that these are normal and nothing to be ashamed of. Similarly, spontaneous erections are common and unpredictable. Assure your son that these occurrences will become less frequent with time.

Pubic Hair

Fueled by testosterone, the development of pubic hair follows closely after the initial changes. Light-colored downy hairs appear at the base of the penis, gradually becoming darker, curlier, and coarser. The pattern of growth forms a diamond shape, spreading toward the thighs and up toward the navel. Around two years later, hair begins to appear on the face, legs, arms, underarms, and eventually the chest.

Voice Changes

As boys reach the peak of their growth spurt, their voice box (larynx) enlarges, and the vocal cords lengthen, causing the voice to deepen. Temporary “cracking” is normal and resolves once the larynx reaches adult size. While girls’ voices also lower in pitch, the change is less pronounced.

Emotional Changes

Puberty doesn’t just affect the body; it can also bring emotional changes. Hormones can sometimes make emotions feel more intense, and experiencing mood swings isn’t abnormal. These emotional shifts are totally normal, but if they ever feel overwhelming, talking to someone like a guidance counselor can be helpful.

Supporting Your Son Through Puberty

Puberty can be an overwhelming time for boys as they navigate significant physical and emotional changes. Here are some ways parents can help:

• Normalize the Changes: Talk openly about what’s happening and reassure your son that these changes are normal and temporary.
• Encourage Questions: Create a safe space for your child to ask questions without judgment.
• Provide Resources: Offer books or reputable websites that explain puberty in a way that’s easy to understand.
• Consult Your Pediatrician: Regular checkups can provide professional reassurance and address any specific concerns.

By fostering open communication and understanding, you can guide your son through this transformative stage with confidence and ease.

For questions or any other concerns, Augusta Pediatrics can be reached at (706) 868-0389. The information on this site is not intended or implied to be a substitute for professional medical advice, diagnosis or treatment. All content, including text, graphics, images and information, contained on or available through this web site is for general information purposes only.