10 Causes of Skin Rashes
Reviewed: Dr. Mera
Cause #2: Allergic Contact Dermatitis
Another common cause of a skin rash is allergic contact dermatitis. It is a delayed type of hypersensitivity reaction that occurs due to a contact with an irritant or allergic substance.
In those who are already sensitized, the allergens will activate the antigen-specific T cells. Typically, it requires repeated exposure to the allergen in order for a person to become sensitized and it usually requires exposure of 24–48 hours before the skin rash starts appearing.
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