How does heat rash look like The appearance of the heat rash depends upon where the excess sweat gets deposited in the skin.
Tiny blisters that look like small beads of sweat are seen if the sweat is blocked at the most superficial layers of the skin where the sweat duct opens on the skin surface. Called miliaria crystalline, it has no symptoms other than these “sweat bubbles.”
Classic heat rash or miliaria rubra occurs if the sweat causes inflammation in the deeper layers of the epidermis. Like any other inflammation, the area becomes red (and therefore the name rubra = red) and the blisters become slightly larger. Because the sweat glands are blocked and don’t deliver sweat to the skin’s surface, the area involved is dry and can be irritated, itchy, and sore. This rash is also called prickly heat. This video is showing how heat rash look like.
This pictures is showing how heat rash look like.