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       Album: Poison Ivy Dermatitis
Category: Allergic Diseases more albums: 

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Poison Ivy dermatitis in a 12 year old female.
Notice the linear vesicular rash.
Poison Ivy, poison oak, or poison sumac dermatitis (also called contact dermatitis to urushiol) is a type IV delayed hypersensitivity immune reaction that occurs in previously sensitized children.
Patients typically present with pruritic papules and vesicles.
Linear vesicular rash is typical. Scratching does not spread the lesions.
Treatment: Class 1 or 2 topical corticosteroids. Systemic corticosteroids may be necessary in severe cases. Antihistamines (like Benadryl) are also helpful.
Washing exposed skin is helpful to remove the antigens, but this is only helpful in the first 20 to 30 minutes.
Barrier creams are helpful in preventing the dermatitis.