I have a very low pain tolerance and would like to try out numbing cream for waxing and tattoos. I've been looking at different numbing creams and the active ingredient seems to be lidocaine at around 4%. I'm not at all educated in this area and don't know if lidocaine could give me an allergic reaction due to my ibuprofen allergy. In an allergic reaction I experience swelling, hives, and shortness of breath.