Allergic rash: manifestation

Allergic reactions often appear different rashes on the skin. Allergic skin lesions develop as a result of congenital (atopic) or acquired hypersensitivity to allergens (drug, food, plants) and are manifested in the form of urticaria, atopic dermatitis and neurodermatitis.

Urticaria - a disease that is manifested by a sudden itch and rash, sometimes on the mucous membranes, blisters, similar in appearance to blisters arising from the touch of nettles, and rapidly disappearing.

The acute form of urticaria occurs in response to various external stimuli: mosquitoes, bees, ants, cold, heat, sunlight. It arises and the intolerance of any foods or drugs.

The cause of chronic urticaria is a chronic infectious and inflammatory diseases, intoxication. Emerging on the background of metabolic disorders, diseases of the gastrointestinal tract, liver and biliary tract.

In some cases, blisters few and vaguely, others increased by peripheral growth, merge (especially in areas affected by irritation) and form large pockets of irritation.

In some cases, the swelling is weak and thus there are stains on the skin, sometimes in the form of a ring. In other cases, the swelling reaches a considerable size, extending deep into the skin and subcutaneous tissue, resulting in the formation of large blisters (angioedema). Rarer form - with hemorrhagic urticaria petechiae on the edges of the blisters and bullous urticaria, in which blisters appear on the surface of bubbles with clear content. Sometimes, after the disappearance of bubbles is increased skin pigmentation. Eruptions are always accompanied by itching.

Hives in the mucous membranes (larynx and bronchi) is accompanied by shortness of breath and paroxysmal cough with phlegm liquid (angioedema). When swelling occurs rapidly increasing threat of suffocation.

The acute form of urticaria lasts more than a few days or a week or two, and chronic relapse occurs many months and years.

Atopy - a hereditary allergy in relation to certain allergens (food, dust, animal hair, fish scales, medicines, bacterial, viral). Atopic dermatitis occurs on the background of atopy manifested from birth in the form of various skin rashes.

The first signs of atopic dermatitis appears approximately one month after birth. It starts with the infant stages of the disease, which is two - three years goes to the nursery. And after ten - twelve years of atopic dermatitis becomes neurodermatitis. If you are allergic to fifteen years does not pass, then a person suffers from neurodermatitis life.

Infant stage of atopic dermatitis previously called exudative diathesis. The disease can occur in the form of dry or moist dermatitis (diathesis).

Weeping diathesis - this is the most typical manifestation of atopic dermatitis. It is manifested by redness, swelling and itching of the skin. At the same time the skin rash appears in the form of papules and blisters (swollen elevations on the skin). On the surface may appear edematous bubbles with clear content. Bubbles burst and then the surface of the skin gets wet. Over time, these patches of skin covered with a crust, but a number of new elements rash, forming thus a mixed picture. Because the rash itches, combing her child, because of what is often joined by a bacterial infection.

Dry diathesis is less common and is manifested severe dry skin, its redness, swelling and itching. Combing a rash on her formed by erosion and shallow ulcers and then crust.

Weeping form of atopic dermatitis may go dry, and vice versa. Both forms may also exist simultaneously (mixed forms).

In two or three years, the disease becomes child's shape and the skin appears tight swelling, redness and small itchy rash that eventually starts to peel off, especially in skin folds.

Since the ten - twelve years of atopic dermatitis becomes atopic dermatitis, which is characterized by lichenification of the skin - lesions in the areas it becomes thickened, dry, her skin pattern clearly emerges. This severely itchy skin, which often causes children nervous system disorders as neuroses. Comb the skin is covered with bruises and crusts. Often joins a secondary bacterial infection, and pustular rash appears.

Allergic rash Rash: Classification - primary and secondary elements

It requires observation and treatment by a specialist allergist-immunologist.