It can occur with products corresponding to shaving lotion, sunscreen and a few perfumes. Eczema, also referred to as atopic dermatitis, affects  between 10 and 20 % of kids and 1 to 3 p.c of adults. A widespread symptom of eczema is dry, red, irritated and itchy skin.
Host elements embody heredity, sex, race, and age, with heredity being by far essentially the most significant. However, there have been recent will increase in the incidence of allergic issues that can't be defined by genetic components alone. Four main environmental candidates are alterations in exposure to infectious illnesses during early childhood, environmental pollution, allergen ranges, and dietary modifications. Certain diets are formulated to cut back the itch brought on by atopic dermatitis.
“The creams that you purchase can produce issues that make your unique problem even worse,” Katz says. Because rashes could be brought on by many various things—bacteria, viruses, medication, allergic reactions, genetic problems, and even light—it’s important to determine what sort of dermatitis you might have. “The most common form of dermatitis that is seen wherever is an allergic contact dermatitis to nickel,” says Katz. Because of ear piercing.” Many  cheap earrings are manufactured from nickel, and over time, carrying nickel earrings can cause an allergic response to the metal. The signs of these various varieties of rashes often 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.
While bug bites typically cause rashes, even simply touching some bugs could cause rashes. For instance, the white-marked tussock moth caterpillar is a standard caterpillar seen in Tennessee in the summertime months. Curious children usually touch its brightly coloured physique. Many people develop a rash after touching the caterpillar or its cocoon hairs. One of the most common rashes from a parasite an infection is scabies.
A contact allergy is the least widespread sort of allergy in canines. It outcomes from direct contact with allergens, similar to pyrethrins, found in flea collars, pesticides, grasses, and supplies, similar to wool or synthetics, utilized in carpets or bedding. Contact allergies can turn into virtually something and at any age.