Medical Encyclopedia

Allergy symptoms

The immune system normally responds to harmful substances such as bacteria, viruses and toxins by producing symptoms such as runny nose and congestion, post-nasal drip and sore throat, and itchy ears and eyes. An allergic reaction can produce the same symptoms in response to substances that are generally harmless, like dust, dander or pollen. The sensitized immune system produces antibodies to these allergens, which cause chemicals called histamines to be released into the bloodstream, causing itching, swelling of affected tissues, mucus production, hives, rashes, and other symptoms. Symptoms vary in severity from person to person.

Page Content:

allergy symptom; food allergy symptom; wheat allergy symptom; mold allergy symptom; seasonal allergy symptom; gluten allergy symptom; milk allergy symptom; dog allergy symptom; cat allergy symptom; pollen allergy symptom; peanut allergy symptom; eye allergy symptom; garlic allergy symptom; shellfish allergy symptom; soy allergy symptom; dairy allergy symptom; sinus allergy symptom; latex allergy symptom; alcohol allergy symptom; sugar allergy symptom; penicillin allergy symptom; allergy spring symptom; egg allergy symptom; sun allergy symptom; flu like symptom allergy; yeast allergy symptom; strawberry allergy symptom; severe allergy symptom; common allergy and symptom; chocolate allergy symptom; child allergy symptom; dust allergy symptom; caffeine allergy symptom; dust mite allergy symptom; sign and symptom of allergy; tomato allergy symptom; nut allergy symptom; pet allergy symptom; allergy and symptom in dog; amoxicillin allergy symptom; allergy symptom in child; allergy condition more symptom; skin allergy symptom; corn allergy symptom; nasal allergy symptom; sulfa allergy symptom; allergy asthma symptom; dog symptom of food allergy; latex condom allergy symptom; seafood allergy symptom; baby food allergy symptom; condom allergy symptom; food allergy wheat symptom; allergy headache symptom; infant allergy symptom; respiratory allergy symptom; allergy grass symptom; coffee allergy symptom; allergy symptom sore throat; iodine allergy symptom; shrimp allergy symptom; allergic allergy food reaction symptom; msg allergy symptom; sulfite allergy symptom; symptom of cold or allergy; symptom of milk allergy in infant; symptom puppy allergy; allergy symptom of the throat; peanut butter allergy symptom; milk allergy symptom in child; allergy symptom fever; infant food allergy symptom; symptom of a sinus allergy headache; allergy pollen symptom tree; allergy cough symptom; allergy to almond symptom; chlorine allergy symptom; strange allergy symptom; gluten food allergy symptom; infant milk allergy symptom; sign and symptom of wheat allergy; symptom metal allergy; allergy symptom coughing; spermicide allergy symptom; allergy symptom sinus acupuncture relief; banana allergy symptom; beer allergy symptom; cold vs allergy symptom; nickel allergy symptom; milk allergy symptom baby; symptom of fish allergy; milk allergy toddler symptom; allergy symptom tree; baby allergy symptom; milk allergy symptom child; formula allergy symptom; allergy ear symptom; the symptom of allergy in a toddler; mango allergy symptom; animal allergy symptom