Allergic reaction 28 October 2020 This is the reaction of the body to an invasion of a chemical substance or allergen that could be harmful or that the body has developed a sensitivity to. Related Articles: How Nail Products Use Science to Reduce Allergies and Enhance BeautyConsumers Facing Gel Polish Allergy RealitiesLangerhans Cells Protect Your Clients Skin During Nail TreatmentWhy You Should Never Use Craft Glitter in Nail ProductsCan Bacteria and Infections Be Passed from Gel Bottles?