Dermatitis

Dermatitis is a blanket term meaning "inflammation of the skin" (e.g. rash). There are several different types of dermatitis. The different kinds usually have in common an allergic reaction to specific allergens. The term may be used to refer to eczema, which is also known as dermatitis eczema or eczematous dermatitis. A diagnosis of eczema often implies atopic dermatitis (childhood eczema), but without proper context, it means nothing more than a "rash".

Bullous (blisters) disorders

There are three main types of bullous (blisters) disorders:

• Acantholysis, including pemphigus.
• Pemphigoid, including bullous pemphigoid and gestational pemphigoid.
• Dermatitis herpetiformis, which appears similar to a herpes virus infection, but is not caused by that virus.