The allergy occurs after the immune system reacts to certain substances ( allergens ), causing inflammation. These substances are usually found in dust mites, pollen, pets, insects, food, medicines and mold.
It is important to note that each organism reacts differently. Therefore, allergens vary from person to person.
Contact with allergens can cause skin irritation in atopic people, the main manifestations being:
Skin damage that causes swelling and intense itching, hives can manifest in any region of the body, including the face, lips, tongue, throat and ears. It is divided between acute and chronic cases, and may last for a few days or weeks. Causes include chemicals, latex, insect bites, sunlight and medications.
When the swelling occurs in the deep part of the skin and not on the surface, the condition is called angioedema. It usually arises around the eyes, lips, genitals, hands and feet.
When rashes and blisters appear on the skin, it is possible that the condition is a contact dermatitis . This condition is caused after contact with certain substances. It can be classified into two types: irritative and allergic. Its most common causes are: detergents, shampoos, metals, varnishes, topical medications, latex gloves.
Atopic dermatitis (eczema)
Chronic condition often associated with food allergy, allergic rhinitis and asthma , atopic dermatitis usually appears in childhood. It causes dry, red and irritated skin, as well as itching. Triggers include some foods, animal dander, dust mites, sweating, wool and soaps.
Allergy to insect bite (stropula)
After suffering a bite, some people have allergic reactions to insect venom. The biggest cause is bees, wasps and ants. It is important to note that some reactions are common in all people and are not necessarily allergies. In allergic conditions, symptoms such as pain, redness, swelling and itching occur at the site of the bite, which last for a longer time. In more severe cases, an anaphylactic reaction is possible.
Allergic reactions to latex occur in people who are allergic to the protein present in products made with natural rubber. This component is quite common in medical and dental materials (gloves, bandages, dressings), condoms, balloons, toys, glasses and tires. The condition is more common in the medical profession, due to direct and daily contact with latex.
Although rare, exposure to cold can cause skin allergies in the form of rashes and itching. The condition manifests itself after exposure to low temperatures, contact with cold water or cold objects and ingestion of cold food or drinks.
Allergy to cosmetics
Some beauty products, such as shampoos, perfumes, soaps and makeup items, can irritate your skin and cause skin rashes, dermatitis and hives. In some cases, there may still be difficulty in breathing and irritation of the mucosa. It is caused by synthetic or natural allergens present in the composition of cosmetics.
Widely used in jewelry and accessories, nickel is a metal that has a high allergic potential. Symptoms usually appear 12 to 48 hours after contact and include itching, redness, rashes and swelling. In more serious situations, the skin can become infected, causing burning and pus.