Types of urticaria
Acute urticaria persists betwixt 12 and 24 hours and had sum of units forms: allergic triggers whose causes are insect stings, peanuts, nuts, shellfish, medicines, and non-allergic triggered through drugs or foods that contain vasoactive amines.
Chronic croup (urticaria) last at least 6 weeks, and the extraction of roots of this form is very ticklish because it can cause complications that have power to be fatal.
Physical and contact rashes are the numerous common. The physical one are caused dint of physical factors such as pressure, make feverish, cold, sun and pressing, and occurs in areas of shoes, belts. Generally transient, disease consequences disappear spontaneously. Contact rashes resulting from junction with plant substances, animals and / or chemical is characterized the agency of papule.
The establishment of chronic urticaria diagnosis is based attached evolutive criteria (from 6 weeks to 6 months). Doctors effect a medical history and physical examination, and sometimes do allergy skin tests and desensitization.
Causes of urticaria
All that is allergen have power to cause hives, but the most belonging to all causes of urticaria are:
Drugs - in some children almost all medicines can end hives, consumption of eggs, fruit, nuts and shellfish (other foods at a past period cause hives in children, but not in adults), viral infections, cancer, leukemia, insect bites , autoimmune diseases, exposure to cold, heat,
or aqueous solutions, light of heaven, food dyes and preservatives, contact through animals, especially cats.
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