Understanding Heat Rash (Miliaria) in Babies: Causes, Symptoms, Treatment, and Prevention

For many parents, noticing a rash on their baby’s skin can be worrying — especially when the cause isn’t immediately clear. Babies cannot communicate discomfort the way older children can, so even small changes in their skin often raise concern. One of the most common warm-weather skin issues babies experience is heat rash, also called miliaria. While it may look concerning, this condition is typically mild, temporary, and easy to manage with proper care.

This guide explains what heat rash is, why it develops, how to identify it, and the safest ways to treat and prevent it so your baby stays comfortable and healthy.