It can occur with merchandise such as shaving lotion, sunscreen and some perfumes. Eczema, also identified as atopic dermatitis, affects  between 10 and 20 percent of children and 1 to three % of adults. A frequent symptom of eczema is dry, pink, irritated and itchy skin.
Host elements embrace heredity, intercourse, race, and age, with heredity being by far the most important. However, there have been recent increases within the incidence of allergic disorders that can't be explained by genetic factors alone. Four major environmental candidates are alterations in exposure to infectious illnesses during early childhood, environmental pollution, allergen levels, and dietary adjustments. Certain diets are formulated to reduce the itch caused by atopic dermatitis.
“The lotions that you just purchase can produce issues that make your unique drawback even worse,” Katz says. Because rashes may be brought on by many alternative things—bacteria, viruses, medicine, allergic reactions, genetic disorders, and even light—it’s essential to figure out what kind of dermatitis you have. “The most typical type of dermatitis that is seen wherever is an allergic contact dermatitis to nickel,” says Katz. Because of ear piercing.” Many  inexpensive earrings are manufactured from nickel, and over time, sporting nickel earrings could cause an allergic reaction to the steel. The signs of those several types of rashes typically overlap. “Itching is a standard 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 include skin reactions, bronchoconstriction, swelling, low blood strain, coma, and dying. This type of reaction may be triggered abruptly, or the onset can be delayed. The nature of anaphylaxis is such that the reaction can appear to be subsiding but may recur all through a time period. Red, bumpy, itchy pores and skin can be irritating, painful and embarrassing.
A contact allergy is the least common type of allergy in dogs. It outcomes from direct contact with allergens, corresponding to pyrethrins, present in flea collars, pesticides, grasses, and supplies, corresponding to wool or synthetics, utilized in carpets or bedding. Contact allergy symptoms can become practically anything and at any age.