Although milk contains calcium, which is enriched with nutrients good for the human body, milk has been known to aggravate acne, especially acne on the forehead. Your best bet is to seek a dermatologist.
Yes! Milk contains lactic acid, which is a natural exfoliator, as well as a high fat content (if you buy whole milk) which helps moisturize your skin. Try adding powdered milk to bath water for a cheap spa treat.