Face itchy with red pimples

My face is itchy with red pimples. The most common is allergic dermatitis. Allergic dermatitis with the use of some inappropriate masks, cosmetics, facial cleanser, exfoliating products, as well as smeared with some inappropriate ointment, are easy to cause itching on the face, there are red pimples phenomenon. There are also some high-protein fish shrimp crab products, contact with dust, dust mites and the like, will also cause itching on the face, there are red pimples phenomenon. Showing itching on the face with red pimples, if repeatedly found, but also to the regular hospital dermatology department for allergen testing, to find out the specific reasons to prevent recurrence. Itching can obviously oral antihistamine drug treatment, local application of anti-allergic drugs.