I don't know exactly what it is, but this magic potion that many of our mother's applied on us after a summer nights play to relieve the nasty itch of mosquito bites does the same for pimples. Dab a little on your pimples before you go to bed to soothe and reduce the redness of acne. For just a few bucks, Calamine lotion may be a great way for you to evict those unwanted acne pimples that are occupying your beautiful face without paying rent! :p
P.S. Some brands even carry calamine with aloe vera in it that absorbs like a lotion for sunburn relief (Hawaiian Waves)!