It can happen with merchandise similar to shaving lotion, sunscreen and a few perfumes. Eczema, also recognized as atopic dermatitis, impacts  between 10 and 20 p.c of youngsters and 1 to 3 p.c of adults. A widespread symptom of eczema is dry, red, irritated and itchy pores and skin.
Host factors include heredity, intercourse, race, and age, with heredity being by far probably the most important. However, there have been current increases in the incidence of allergic issues that can't be explained by genetic factors alone. Four major environmental candidates are alterations in exposure to infectious ailments throughout early childhood, environmental air pollution, allergen levels, and dietary adjustments. Certain diets are formulated to reduce the itch attributable to atopic dermatitis.
“The lotions that you purchase can produce issues that make your unique downside even worse,” Katz says. Because rashes may be attributable to many various things—bacteria, viruses, medication, allergic reactions, genetic problems, and even light—it’s essential to determine what type of dermatitis you might have. “The most typical type of dermatitis that's seen anywhere is an allergic contact dermatitis to nickel,” says Katz. Because of ear piercing.” Many  cheap earrings are made from nickel, and over time, sporting nickel earrings can cause an allergic reaction to the metallic. The signs of those several types of rashes often overlap. “Itching is a common symptom for all these problems,” says Dr. Stephen I. Katz, director of NIH’s National Institute of Arthritis and Musculoskeletal and Skin Diseases.
While bug bites usually trigger rashes, even simply touching some bugs could cause rashes. For example, the white-marked tussock moth caterpillar is a common caterpillar seen in Tennessee in the summertime months. Curious youngsters often touch its brightly coloured physique. Many people develop a rash after touching the caterpillar or its cocoon hairs. One of the commonest rashes from a parasite an infection is scabies.
A contact allergy is the least widespread kind of allergy in dogs. It outcomes from direct contact with allergens, corresponding to pyrethrins, present in flea collars, pesticides, grasses, and supplies, such as wool or synthetics, utilized in carpets or bedding. Contact allergies can become practically anything and at any age.