Many factors can impact an allergic reaction and, although a rarity, they can happen. Mink lashes, since they are made of 100% real mink , may cuase an allergy. If you are allergic to any animals, like cats or dogs, then real mink lashes may not be for you. Try synthetic lash extensions. Eye gel pads and medical tape, depending if you have an allergy to adhesives or latex, can also cause an allergy. Lash remover, primers, cleansers, or other products can be the root of the problem. If you have allergy to certain ingredients, make sure to do patch test by your lash expert during your initial consultation. People with allergies such as hay fever, which involves constant eye rubbing, may not be best suited for eyelash extensions during season