Before using rosemary oil for hair growth, lash growth, or brow growth, patch testing is a crucial first step. This video explains how to patch test properly, why it matters for sensitive skin, and ...

The American Academy of Dermatology outlines the following steps to perform a patch test: Check whether they are carrying an epinephrine pen. If they are, follow the instructions on the side of the ...

Using a new skin care product without testing it first can potentially cause allergic contact dermatitis, an inflammatory skin condition in which the immune system overreacts to an ingredient in the ...

Allergies are common and can be triggered by anything from certain foods and chemicals to dust or pet dander. While some people discover their allergies only after an unexpected reaction, deliberately ...