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heat rash

American  

noun

  1. prickly heat.

heat rash British  

noun

  1. a nontechnical name for miliaria

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of heat rash

First recorded in 1885–90

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

This process can cause mild symptoms such as an itchy heat rash or swollen feet.

From BBC • Jun. 19, 2025

Hotter temperatures can lead to heatstroke, heat exhaustion, heat cramps, sunburn or heat rash, according to the Los Angeles County Public Health Department.

From Los Angeles Times • Apr. 24, 2024

"I got a heat rash that wouldn't go away."

From Salon • Sep. 6, 2023

But Naranjo said her son’s body was covered in a heat rash.

From Seattle Times • Jul. 18, 2023

My heat rash had flared in July and hadn’t subsided.

From "The Help" by Kathryn Stockett

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.