Place a cool, wet towel on the back of your neck.

"When your face flushes during exercise, it's a normal physiological response to your body overheating," says Lydia Evans, a dermatologist in Chappaqua, New York.

"Your blood vessels dilate and increase blood flow to the surface of the skin to cool it, which gives it that red appearance."

A cold towel on the back of the neck constricts those blood vessels, numbs the nerve endings there, and helps lower your body temperature quickly, says Debra Luftman, a cosmetic dermatologist in Beverly Hills.

Splashing cold water on your face will have the same effect.

Quick tip: Carry a spray bottle filled with cold water to the gym.

When you feel your face getting warm, spritz it with water.

This will help keep the redness to a minimum.