Eyelash extensions have become increasingly popular over the years as a way to achieve longer, fuller lashes. However, for some individuals, the application of eyelash extensions can result in an allergic reaction. Allergic reactions can cause discomfort, irritation, and even lead to more serious issues if left untreated. In this article, we will discuss the causes and symptoms of allergic reactions to eyelash extensions and provide some tips on what to do if you are experiencing an allergic reaction.