Also called nettle rash or hives. Urticaria is a temporary skin condition often due to an allergic reaction and is characterized by an elevated patch of skin (reddish or pale) and/or pimples and wheals accompanied by burning, stinging, or severe itching sensation. Additional Info: Hives can often be treated with an antihistamine such as Benadryl (trademark name for diphenhydramine). In rare cases, airway obstruction or anaphylactic shock (system-wide allergic response) could occur, requiring immediate medical intervention. Hives can be caused by many agents, and in many cases the exact cause is not known. The red welt most of us get following a bee sting is probably the most familiar example of a hive. There are many homeopathic "remedy" sites on the Internet which claim to solve all sorts of health conditions, especially hives, using mixtures that contain no active ingredients whatsoever. Make no mistake, the term "homeopathic remedy" is an oxymoron and the promoters of homeopathy are simply quacks or charlatans who prey on human foibles. Some may swear by their homeopathic "cure" for hives, but the fact is that hives commonly go away with no treatment at all. MSDS Relevance: Urticaria can be a symptom of exposure to certain chemicals. As always, read your MSDS's so you know if hives are a symptom of exposure. Should you develop hives, you can take extra precautions to make sure you are not exposed to the material and See: If the condition improves. See also: Eczema, Erythema, Sensitizer