Sometimes on the body of a child or adult ariseedematous dense bright pink blisters with a diameter of up to 15 cm of very different outlines. Inflamed bumps of skin rise above the general surface of the skin, often pale closer to the center of the rash. Such a phenomenon can last from a few minutes to hours, subsequently disappearing without a trace. Anyone who has watched such a picture should know that he faced an allergic disease, known as "urticaria". Causes of the disease should be identified without fail, since the further course of urticaria will depend on the precautionary measures taken.
Allergic urticaria can be causedfor a variety of reasons. In the question of how hives are treated, the reasons for its occurrence play the most direct role. The causes of hives are divided into exogenous and endogenous. External factors causing this allergic disease include factors of physical exposure to temperature, chemical agents or mechanical action. Endogenous factors include various pathological processes occurring in internal organs, as well as abnormalities in the activity of the nervous system. Cholinergic urticaria, for example, appears with nervous excitement, leading to the release of acetylcholine in the tissues.
In acute urticaria characterized by a suddenand a rapid onset with the occurrence of skin itching, burning sensation, like with nettle burn and the appearance of numerous reddish rashes on the entire surface of the skin, including the mucous membrane of the mouth, lips, tongue.
When it comes to the acute course of the disease, urticaria, the causes are found, as a rule, in food or medicine taken ill.
Of the most severe and dangerous forms, there is edemaQuincke, which, developing in the larynx, can lead to asphyxia and stenosis of the larynx. For the edema of Quincke, a characteristic phenomenon is a sudden swelling of the skin, which affects even subcutaneous fatty tissue. The skin becomes dense, white. Edema occurs, usually after a few hours or days.
Separate attention deserves a chronicrelapsing urticaria, the causes of which are due to the focus of a chronic infection present in the body, as well as disorders in the work of the gastrointestinal tract and liver. The danger of the chronic form of hives is in its unpredictability and impetuosity. Relapses of the disease occur after an indefinite period of remission. Appearing on the skin, blisters are accompanied in some cases by headaches and general weakness, possibly a fever and arthralgia. If the process of swelling affects the mucous membrane in the areas of the gastrointestinal tract, a frequent additional symptom is nausea, upset stomach, vomiting. In view of the arisen disturbing allergic pruritus, the chronic form of hives can occur against the background of insomnia and neurotic disorders.
A type of photodermatosis is solarurticaria, the causes of which lie in various diseases of the liver, as well as impaired internal metabolism with simultaneous sensitization to the ultraviolet. Eruptions are localized on limited parts of the body, exposed to direct sunlight. Solar urticaria is seasonal, the active period for the development of hives is spring-summer. Occurs during prolonged exposure to the sun, possibly development of problems with the respiratory system and cardiac activity, and even shock.
Understanding the reasons that triggered the development of an allergic reaction, it will be easier to secure the patient in the future, not provoking the degeneration of the acute form into a chronic one.
