Why do you feel hot when you get a sunburn?

It is important to understand that a sunburn is a real burn. It occurs right in the skin surface because of damage caused by ultraviolet light. One of the results of the damage is to enlarge the tiny blood vessels just under the surface. That allows more blood to flow to the skin, making the skin look red and feel warm. It has happened to me, too, and it made me feel warm all over.

We should be more careful about getting too much sun. Getting a deep tan every summer looks healthy, but actually it is not. Ultraviolet light is likely to make your skin less flexible and more wrinkled—it makes your skin look older.