Although it is rare, it is possible to have an allergic reaction to the gel pads or the adhesive used to apply for the extensions, you may suffer allergy reactions and in that case, we recommned a patch test 1-2 days before your appointment. If develop an allergic reaction, please contact us immediately as we will offer you a full removal. We do not recommend doing a full-set afterwards as the eye will be tender and the allergy may persist.