Some folks are allergic to Calamine lotions, so watch out. Also, there are a few brands now that do not have the traditional orangey color which is more appealing if you are going to put it on your face. Whereas Calamine will dry out pimples, leaving it on the skin keeps the skin surface closed, which is often how pimples get formed in the first place.
Witch-hazel is an astringent, which will tighten pores. This may aggravate some people's skin conditions by closing the skin surface. It is very cooling and does not sting like rubbing alcohol. If I use it on my skin, it is at the end of a cleansing treatment when I want to reclose the pores of my face.
Tea-tree oil is a great anti-bacterial but undiluted it can burn the skin of some people, and it has a really strong smell. Diluted it works much better, and can shrink/remove keloid-type scarring that sometimes form around body piercings.
- Rae