It can happen with products similar to shaving lotion, sunscreen and a few perfumes. Eczema, also identified as atopic dermatitis, affects  between 10 and 20 % of kids and 1 to 3 % of adults. A widespread symptom of eczema is dry, red, irritated and itchy skin.
Host factors include heredity, intercourse, race, and age, with heredity being by far essentially the most significant. However, there have been recent increases within the incidence of allergic problems that cannot be defined by genetic elements alone. Four main environmental candidates are alterations in exposure to infectious diseases throughout early childhood, environmental pollution, allergen levels, and dietary adjustments. Certain diets are formulated to reduce the itch brought on by atopic dermatitis.
“The lotions that you buy can produce issues that make your original downside even worse,” Katz says. Because rashes can be brought on by many various things—bacteria, viruses, medication, allergic reactions, genetic problems, and even light—it’s necessary to determine what type of dermatitis you could have. “The commonest form of dermatitis that is seen anywhere is an allergic contact dermatitis to nickel,” says Katz. Because of ear piercing.” Many  inexpensive earrings are made of nickel, and over time, wearing nickel earrings may cause an allergic reaction to the metallic. The symptoms of these different sorts of rashes usually overlap. “Itching is a common symptom for all these issues,” says Dr. Stephen I. Katz, director of NIH’s National Institute of Arthritis and Musculoskeletal and Skin Diseases.
With ingredients that enhance pores and skin well being and reduce the inflammatory response, these diets can cut back itching in allergic pets. These diets are usually out there out of your veterinarian. The term atopic dermatitis in the dog is often used as a synonym for atopy. The primary allergens are tree pollens (cedar, ash, oak, and so on.), grass pollens, weed pollens , molds, mildew, and house dust mites. Many of these allergic reactions occur seasonally, similar to ragweed, cedar, and grass pollens.
A contact allergy is the least frequent kind of allergy in dogs. It results from direct contact with allergens, corresponding to pyrethrins, present in flea collars, pesticides, grasses, and supplies, similar to wool or synthetics, used in carpets or bedding. Contact allergies can develop into virtually anything and at any age.