Never take a bath with cold water after strenuous exercise. Just after exercise, stand still for a while, and then take a shower with warm water after the sweat subsides.

Suggestion:

It is normal to blush after exercise. When taking a bath, our blood will flow faster, and of course our faces will turn red. Don't worry. After taking a shower, apply some toner or a small amount of lotion to your face in time, so that the facial skin won't be too dry, and the redness will subside after ten minutes. You'd better do some hydrating mask at night.