Although it's an ingredient in many skin lotions, it would take much more aloe vera than most products contain for the anti-irritant properties to work. Ingredients such as fragrance and preservatives can cause allergic reactions in some people. Skin reactions, which doctors call contact dermatitis, should be taken seriously. Even if you've used a cosmetic for years with no problems, you can develop an allergic reaction as you become sensitized to one or more of the ingredients. Before placing this claim on the label, some companies conduct tests, and others simply don't include perfumes or other common problem-causing ingredients in their products.
Natural ingredients can cause allergic reactions.
If you have an allergy to certain plants or animals, you could have an allergic reaction to cosmetics containing those ingredients. Marcia Sheets, a substitute teacher in Sykesville, Md., has tried to use cosmetics for years, but even those claiming to be allergy-free have created problems for her. If you have allergies, you just don't use the stuff. Over the years, I've figured out what I can use and what I can't. If you have an allergic reaction to a cosmetic, you should stop using all cosmetics until you call your doctor, who will then try to determine which ingredient, or combination of ingredients, caused the reaction.