Allergic contact dermatitis represents a delayed-type hypersensitivity reaction (Type IV hypersensitivity). There are four types of hypersensitivity reactions, which include Type I, immediate-type ...

Medically reviewed by Jurairat J. Molina, MD Allergies are an immune system reaction to substances called allergens. The cause a range of symptoms from a stuffy nose to itchy eyes to difficulty ...

This heightened reaction is typically directed against harmless antigens, leading to unintended tissue damage. There are four main types of hypersensitivity reactions: Type I, which involves ...

A non-exhaustive summary of reported cases of cutaneous reactions caused by a metallic ... be useful in confirming metal allergy in these types of patients. The temporal and physical evidence ...

it is reasonable to think that electromagnetic hypersensitivity (EHS) is very real. Humans have genetic differences that can result in diverse reactions to the environment. Some may be sensitive ...