Overview

At age 16, the male body is going through puberty, which brings changes to the penis, testicles, and other body systems. It’s normal to have questions about anatomy, function, and health. This guide provides a straightforward explanation and practical tips.

Anatomy

  • Penis: The external male sex organ used for urination and sexual activity. It has three main parts:
    • Glans: The rounded, sensitive tip.
    • Body (shaft): The length of the penis containing tissue that fills with blood during an erection.
    • Foreskin: A fold of skin covering the glans in many males; it can be removed (circumcision) or left intact depending on individual and cultural factors.
  • Urethra: The tube inside the penis that carries urine out of the body and semen during ejaculation.
  • Puberty changes: Hormonal changes lead to erections, spontaneous nighttime erections (morning wood), and growth of penile size and body hair.

Common Puberty Changes

  • Increased erections and libido as hormones rise.
  • Growth in penis and testicles; sometimes uneven growth is normal.
  • Changes in skin, such as oilier skin or acne.
  • Growth of hair on the body, including underarms and pubic area.

Health and Hygiene

  • Hygiene: Clean the penis and foreskin (if present) during regular showers. Gently wash with warm water; avoid harsh soaps on sensitive skin.
  • Skin checks: Look for red spots, itching, unusual discharge, or sores. If you notice anything unusual, talk to a healthcare provider.
  • Urethral discharge or pain during urination: Seek medical advice promptly, as these could indicate an infection.
  • Safe sex: If sexually active, use protection (condoms) to reduce risk of sexually transmitted infections and unwanted pregnancy. Get regular STI testing as recommended by a clinician.

Mood, Mental Health, and Body Image

Puberty can bring mood swings and concerns about body image. If you ever feel overwhelmed, talking to a trusted adult, school counselor, or healthcare provider can help.

When to Seek Medical Advice

  • Severe or persistent pain in the penis or testicles.
  • Unexplained lump, swelling, or a groin injury.
  • Bleeding from the urethra, severe itching, or persistent discharge.
  • Difficulty urinating or blood in urine.

Bottom Line

It’s normal to have questions about the penis during adolescence. Understanding anatomy, practicing good hygiene, and knowing when to seek care helps maintain health as you grow.