Contact Dermatitis

Question 1

What are the two main types of contact dermatitis?

Answer 1

Irritant contact dermatitis

Allergic contact dermatitis

Question 2

What is irritant contact dermatitis?

Answer 2

Common - non-allergic reaction due to weak acids or alkalis (e.g. detergents) Often seen on the hands. Erythema is typical, crusting and vesicles are rare.

Question 3

What is allergic contact dermatitis?

Answer 3

Type 4 hypersensitivity reaction. Uncommon - often seen on the head following hair dyes. Presents as an acute weeping eczema which predominantly affects the margins of the hairline rather than scalp iteself.

Question 4

What is the treatment of contact dermatitis?

Answer 4

Topical treatment with potent steroid