Armpit Hair and Puberty: What You Need to Know

Armpit hair growth is a common puberty sign. Puberty (transition from child to adult) typically starts ages 8–13, bringing:

  • Growth spurt
  • Voice changes
  • Breast development (girls)
  • Facial hair (boys)
  • Increased sweating
  • Acne

Hormones from pituitary and adrenal glands trigger these secondary sexual characteristics.

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