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Heat Rash

Definition

  • A fine pink rash caused by overheating
  • Mainly on the neck, chest, and upper back

Symptoms of Heat Rash

  • Tiny, pink bumps
  • Mainly on the neck, chest and upper back
  • Occurs during hot, humid weather or after lots of sun
  • Heat rash can be itchy
  • Older children may have a "prickly" pins and needles feeling
  • In babies, the rash can have some tiny water blisters
  • No fever or illness
  • Also called "prickly heat"

Causes of Heat Rash

  • Heat rash is caused by blocked-off sweat glands.
  • Hot Weather. Hot, humid weather can cause the sweat glands to be overworked.
  • Ointment. Babies can also get it in the wintertime from ointments put on the skin. Reason: ointments can block off sweat glands.
  • Location. Heat rash of the forehead can be caused by oil or ointment on the hair. Heat rash of the face of a breastfed baby can be caused by lanolin put on the nipples. Heat rash of the chest can be caused by menthol ointments put on for coughs.
  • Exercise. Older children can get heat rash with hard exercise.

Barton Schmitt MD, FAAP
Disclaimer: this health information is for educational purposes only. You, the reader, assume full responsibility for how you choose to use it.
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