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The exact mechanism of the condition is unknown. Some studies have suggested the itching occurs in response to increased fibrinolytic activity in the skin, [5] [6] inappropriate activation of the sympathetic nervous system, [7] increased activity of acetylcholinesterase, [8] [9] or an increase in mast cell degranulation that releases histamine and other chemicals into the body.
Referred itch or mitempfindung is the phenomenon in which a stimulus applied in one region of the body is felt as an itch or irritation in a different part of the body. The syndrome is relatively harmless, though it can be irritating, and healthy individuals can express symptoms.
The water challenge test consists of application of a 35°C water compress to the upper body for 30 minutes. Water of any temperature can provoke aquagenic urticaria; however, keeping the compress at a similar temperature to that of the human body (37 °C) avoids confusion with cold urticaria or cholinergic urticaria. In addition, a forearm or ...
The possible causes of chronic itch go way beyond dry skin. The post 11 Things Your Itchy Skin Can Reveal About Your Health appeared first on Reader's Digest . Show comments
Cold urticaria (essentially meaning cold hives) is a disorder in which large red welts called hives (urticaria) form on the skin after exposure to a cold stimulus. [1] The hives are usually itchy and often the hands, feet and other parts of the body will become itchy and swollen as well.
Experts break it down why it happens and what to do if it’s serious. Coughing after you eat can be just one of those things, or a sign of something more serious. Experts break it down why it ...
Symptoms include recurrent episodes of hives, which are red, itchy, and swollen areas on the skin. These episodes can be triggered by various factors, including heat, stress, or for no identifiable reason. [6] Autoimmune urticaria is a relatively rare condition, affecting a small percentage of the population. [1]
A wide variety of foods can cause allergic reactions, but 90% of allergic responses to foods are caused by cow's milk, soy, eggs, wheat, peanuts, tree nuts, fish, and shellfish. [41] Other food allergies, affecting less than 1 person per 10,000 population, may be considered "rare". [ 42 ]