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Piggyback-acquired hypertrichosis.

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Topical minoxidil exposure in infants can cause generalized hypertrichosis, a condition of excessive hair growth. Discontinuation of minoxidil led to the resolution of symptoms in a 9-month-old infant.

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Area of Science:

  • Pediatric Dermatology
  • Pharmacology

Background:

  • Topical minoxidil is a common treatment for hair loss.
  • Infant exposure to medications can lead to adverse effects.

Observation:

  • A 9-month-old infant experienced generalized hypertrichosis after prolonged skin contact with 5% topical minoxidil.
  • The exposure occurred through close physical contact with a caregiver using the medication daily.

Findings:

  • The infant developed excessive hair growth on both exposed and unexposed body areas.
  • Hair growth normalized within 4 months after minoxidil exposure was eliminated.

Implications:

  • This case highlights the risk of unintended minoxidil absorption and hypertrichosis in infants.
  • Caregivers using topical minoxidil should take precautions to prevent infant exposure.