The human body secretes histamine along with some more chemicals into the blood as an allergic reaction to some substances. This may lead to bulky skin, itching and similar symptoms. Hives is a common disease in people with low resistance power and allergic to particular things.
Chronic urticaria is the term used for hives lasting more than 2 months. Visually there are no such dissimilarities between normal and chronic urticaria. The most severe circumstances of urticaria may even last for more than two years. It was seen from a survey that chronic urticaria lasts more than a year in above 60% of the urticaria patients and for 18 or more years in 20% of them.
Some drugs leading to allergic reactions that cause Urticaria include: suphonylurea, aspirin, some anti-convulsants and more. Urticaria caused by drugs has also been a reason for critical cardiac complexities. Sulphonylurea glimepiride, a drug used for controlling diabetes in particular, has been known to cause allergic reactions leading to Urticaria. Even aspirin intake has many cases has been seen as a cause for urticaria.
Other sources causing urticaria:
• Insect bites- A lot of insects may trigger urticaria.
• Water contact- A rare kind of urticaria happens upon contact with water. This may last from 15 minutes to an hour. » Read more: A Study On Ulticaria
