Contact dermatitis: Difference between revisions
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==Background== | ==Background== | ||
*Type IV hypersensitivity reaction | *Type IV [[Hypersensitivity Reaction|hypersensitivity reaction]] | ||
*Three Types | |||
**Allergic contact dermatitis: nickel, gold, chromium, poison ivy, poison oak, and poison sumac | |||
**Irritant contact dermatitis: solvents, neat oils, kerosene, surfactants in cosmetics, latex, drain cleaners | |||
**Photocontact dermatitis: interaction with UV light (lime juice and sunlight) | |||
==Clinical Features== | ==Clinical Features== | ||
*Inflammation of the epidermis and dermis | |||
**Erythema may take 1-3 days to show up | |||
**May also have blisters and wheels | |||
**Itchy, burning, and sometimes painful | |||
**Can take weeks to heal | |||
[[File:Contact_dermatitis_around_wound.jpg|thumbnail|Contact dermatitis]] | |||
==Differential Diagnosis== | ==Differential Diagnosis== | ||
*[[Contact dermatitis]] | |||
*[[Bullous pemphigoid]] | |||
*[[Eczema]] | |||
*[[Pityriasis rosea]] | |||
*[[Psoriasis]] | |||
*[[Tinea]] | |||
==Diagnosis== | ==Diagnosis== | ||
Revision as of 01:47, 21 October 2015
Background
- Type IV hypersensitivity reaction
- Three Types
- Allergic contact dermatitis: nickel, gold, chromium, poison ivy, poison oak, and poison sumac
- Irritant contact dermatitis: solvents, neat oils, kerosene, surfactants in cosmetics, latex, drain cleaners
- Photocontact dermatitis: interaction with UV light (lime juice and sunlight)
Clinical Features
- Inflammation of the epidermis and dermis
- Erythema may take 1-3 days to show up
- May also have blisters and wheels
- Itchy, burning, and sometimes painful
- Can take weeks to heal
