Like all cosmetic products, there are some individuals who may be allergic to this particular adhesive. Allergic reactions are extremely rare however, and subside normally as soon as the extensions are removed. If you have extreme latex/band-aid allergies, you may be at higher risk of a reaction. If you have had an allergic reaction to any eyelash extensions before (swollen, puffy eyelids and under eye area) we do not recommend getting lash extensions again – as it is highly likely you will be allergic again. If you do have an allergic reaction, you must seek medical attention and we will need to remove the extensions as soon as possible.