Vaping or the use of e-cigarettes has been touted as “safer” than smoking cigarettes. Yet, is this really true? With respect to skin allergies, hives and itching, there may be more to be studied. Many of the liquids used for vaping containe propylene glycol, a known skin allergen. In addition, many contain fruit and spice flavorings such as strawberry, mint and berry extracts that are know irritants on the skin and possibly can also produce hives and a systemic reaction. If you already know that you are allergic to berries, then vaping an extract with berries could produce a systemic allergic response in your lungs and trigger a skin allergy.