It can occur with merchandise such as shaving lotion, sunscreen and some perfumes. Eczema, also called atopic dermatitis, affects  between 10 and 20 % of children and 1 to 3 % of adults. A common symptom of eczema is dry, red, irritated and itchy skin.
Host factors embrace heredity, intercourse, race, and age, with heredity being by far the most significant. However, there have been current increases within the incidence of allergic disorders that can't be defined by genetic elements alone. Four main environmental candidates are alterations in exposure to infectious illnesses throughout early childhood, environmental air pollution, allergen ranges, and dietary changes. Certain diets are formulated to reduce back the itch caused by atopic dermatitis.
“The creams that you just purchase can produce issues that make your authentic problem even worse,” Katz says. Because rashes may be attributable to many various things—bacteria, viruses, medication, allergy symptoms, genetic issues, and even light—it’s important to determine what type of dermatitis you've. “The most common type of dermatitis that is seen anyplace is an allergic contact dermatitis to nickel,” says Katz. Because of ear piercing.” Many  inexpensive earrings are manufactured from nickel, and over time, carrying nickel earrings may cause an allergic response to the steel. 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.
Depending on the severity, anaphylaxis can embody skin reactions, bronchoconstriction, swelling, low blood strain, coma, and demise. This sort of reaction may be triggered abruptly, or the onset could be delayed. The nature of anaphylaxis is such that the reaction can seem to be subsiding however could recur all through a time period. Red, bumpy, itchy pores and skin can be irritating, painful and embarrassing.
A contact allergy is the least widespread kind of allergy in dogs. It outcomes from direct contact with allergens, similar to pyrethrins, found in flea collars, pesticides, grasses, and materials, similar to wool or synthetics, used in carpets or bedding. Contact allergies can develop into practically anything and at any age.