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Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more
Get tested: Consider seeing a trained allergist for evaluation. Skin testing takes a half hour & can reveal to what you're allergic. It might be the pollens of plants, mold spores, dust mites, or animal dander. Your allergist can help you decide which are relevant & devise a strategy that may include avoiding those allergens, taking medication or receiving allergy injections. Knowiedge is half the battle. ...Read moreSee 2 more doctor answers
Varied symptoms: The symptoms vary by affected area and type of allergy. Food allergies typically affect the skin (hives, itching). Environmental allergies typically affect the respiratory tract (nose - itching and congestion, throat - itching and mucus, lungs - tightness and mucus). Eyes (itching, redness and watering) and ears (itching) are also frequently involved. See an allergist for specific answers. ...Read moreSee 1 more doctor answer
History & testing: Testing may be performed with a history of typical allergy symptoms after eating something containing barley. Skin and blood (rast) testing are accurate & easy to perform. Tests for other foods eaten at the same time should be negative. When the diagnosis is uncertain an oral challenge to barley may be considered. This should only be performed by experts experienced with oral challenges. ...Read more
Nsclc st4. Diagnostic CT scans used iodine contrast but due to allergy, post treatment CT scans used barium. How accurate/comparable are the scans?
There are two: Skin testing (prick/puncture and intradermal) and RAST (radioallorsorbent) testing are the only truly reliable tests for allergies and these need to be performed by an allergist who is not only trained in performing the test but in interpreting the results as well. Keep in mind you may test positive for something that you don't actually react to or need intradermal testing as well as prick testing ...Read moreSee 1 more doctor answer