Contact dermatitis

Question 1

types

Answer 1

1. irritant
2. allergic

Question 2

what is irritant dermatitis?

Answer 2

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 contact dermatitis?

Answer 3

type IV hypersensitivity reaction.

Uncommon - often seen on the head following hair dyes.

Presents as an acute weeping eczema which predominately affects the margins of the hairline rather than the hairy scalp itself.

Topical treatment with a potent steroid is indicated

cement is common cause