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Risk factors
By Mayo Clinic staffThough heat rash can affect anyone, newborns are most susceptible. Other factors that make you more prone to heat rash include:
- Climate. People living in the tropics are far more likely to have heat rash than are people in temperate climates. You're especially susceptible when you first move to a hot, humid locale.
- Intense physical activity. Anything that makes you sweat profusely, especially if you're not wearing moisture-wicking clothing, can trigger heat rash.
