Help whole face red after threadin?

Relax. Your hair will not come back ten times worse, and it may actually have helped your acne (because any hair follicles which were infected are gone). Your face stings because she removed a lot of hair. Splash your face with cold water, do not put any creams or lotions on your face for 12 hours or so, and tomorrow it will be fine. BTW a cool damp face cloth is a much better idea than ice, unless you have an actual burn it's not a good idea to put ice onto your face, it can cause skin problems.