HIVES
URTICARIA or hives is a rash with raised, itchy, red wheals on the surface of the skin. The rash is usually transient, lasting less than 24 hours, but tends to recur. Sometimes the patient complains only of generalised itch and the rash appears only on scratching.
Urticaria is common and has an incidence of about 15% in some populations studied. Although persons from any age may experience urticaria, the condition is most commonly seen in young adults.
Hives is characterised by a rash with raised, itchy, red wheals on the skin.In urticaria, as a result of an abnormal reaction to certain substances, histamine and other substances are released, causing itching, swelling and other symptoms.
Many substances can trigger urticaria, for example, medications, food (like shellfish, fish, nuts, eggs and milk) and animal dander (especially from cats). Certain food additives and preservatives may also cause this reaction.
Urticaria can persist and become chronic and in these cases the trigger may not be apparent. In some of these cases, an immunological abnormality in the blood may be the cause of the disease.
Urticaria is common and has an incidence of about 15% in some populations studied. Although persons from any age may experience urticaria, the condition is most commonly seen in young adults.
Hives is characterised by a rash with raised, itchy, red wheals on the skin.In urticaria, as a result of an abnormal reaction to certain substances, histamine and other substances are released, causing itching, swelling and other symptoms.
Many substances can trigger urticaria, for example, medications, food (like shellfish, fish, nuts, eggs and milk) and animal dander (especially from cats). Certain food additives and preservatives may also cause this reaction.
Urticaria can persist and become chronic and in these cases the trigger may not be apparent. In some of these cases, an immunological abnormality in the blood may be the cause of the disease.
posted by Madison @ 9:33 AM
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