Urticaria (Hives)
Urticaria is a dermatosis characterized by the presence of hives, localized or scattered throughout the body. It can also invade other parts of the body, such as the digestive system, the respiratory system, the vagina, and so on.
Agents that cause hives:
- Substances of plant or animal nature
- Mechanical or physical (hot or cold, light pressure)
-Food or medicines.
The mechanisms that lead to the formation of hives and dell’edema are determined by the antigen and antibody, which give rise to two chemical compounds: histamine (or substance istaminosimile) and the serotina. These substances act in subcutaneous tissue, causing an expansion of the fabric. The permeability of blood vessels is altered, causing the leakage of serum that generates the hives and edema.
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