What causes contact dermatitis?

Answer:
Contact dermatitis is usually due to an allergic reaction to something in the environment. This allergen will come "in contact" with the skin, producing an allergic reaction, usually a rash that is itchy and red.
First answer by Doditov. Last edit by Doditov. Contributor trust: 1501 [recommend contributor recommended]. Question popularity: 0 [recommend question].