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 ...
However, other metal ions as well as bone cement components can cause such hypersensitivity reactions. To complicate things, patients may also develop delayed-type hypersensitivity reactions to ...
The skin is then examined for any signs of a hypersensitive reaction. Image Credit: Neeila/Shutterstock.com Patch testing detects allergic contact dermatitis, a type IV hypersensitivity reaction.