What is an acute urticaria?

urticaria, also known as the hives, is a skin disorder characterized by fissimic, which are increased skin lesions with well -defined edges of redness and swelling, often associated with itching. This condition may be acute or chronic, the first lasting up to 6 weeks and the second persists for more than 6 weeks. Acute urticaria evolves and disappears within a few hours after exposure to stimulating agents and episodes often persist for days. This is most often due to reaction to food, medicines, chemicals, insect bite, infection, physical stimulants or chronic inflammatory disease. Immune -mediated release of histamine is most often due to immunoglobulin E (IgE) mediated by reaction against a foreign substance perceived by the body as dangerous. Non -immune relaxation of histamine is caused by chemicals that can directly cause tasting of mast cells. Urticaria most often affects individuals aged 20 to 40 years, although individuals of all age groups can be affected.

In children, an allergic reaction to food is one of the main reflections in acute urticaria. The most common known foods that can cause an allergic reaction are peanuts, eggs and seafood such as fish and molluscs. Drugs that usually cause acute urticization are penicillin, aspirin, sulf -based drugs, non -steroidal anti -inflammatory drugs, opioids, inhibitors of the converting angiotensin (ACE), polymyxin B and diuretics. Amonia's persulfate, found in the chemicals of hair, latex and intravenous radiocontrast media, is an example of a chemical that can cause an acute hill.

viral infections are the most common infection that can cause acute urticaria. Examples are hepatitis B and C infections. Physical stimulants that can cause acute urticization include cold, sunlight, pressure, water and vibration. Examples of chronic inflammatory diseases that can cause acute urticariaou systemic lupus erythematosus and rheumatoid arthritis.

diagnosis is usually determined by a complete thorough history and physical examination. Imaging studies and skin biopsy are only performed if they are indicated by history. Disease management is to identify its etiology and, if possible, control its severity, to alleviate itching and discomfort and educate the patient. Prevention of future acute urticaria episodes can be performed by the patient's education and avoiding identified etiology. The relief of itching and discomfort can be achieved by using antihistamines of the first or second generation with antagonists histamine 2 (H2), tricyclic depressions, antagonists of leukotrien or glucocorticoids.