This is great question. Some of my favorite things to use for Contact dermatitis is Histablock from Nature's Sunshine to help bring down the histamine level in the body. This can help with any form of inflammation and redness. I also love using Tea Tree essential oil topically in a diluted form, preferably with a lotion to carry it. This can help get rid of whatever is causing the dermatitis as well as help with skin cell regrowth.