Allergy Symptoms
Today's Top News Stories | | Seniors Having More Sex Than Ever - Jul 09, 2008, 09:00 Study finds big jump in number of those over 70 who are 'doing it' | | Men Often Not Told of Severity of Wife's Cancer - Jul 09, 2008, 09:00 Study finds almost 40% say docs never said condition was terminal until near death. | | Gene Activity May Explain Deadlier Breast Cancers Among Younger Women - Jul 09, 2008, 09:00 Study finds more than 350 common sets of genes in patients under 45. | | Breast-Conserving Surgery Leaves Many Cancer Patients Disappointed - Jul 09, 2008, 09:00 Poor aesthetic outcome after lumpectomy linked to depression, fear, study finds. | | A Blood Marker Could Spot Diabetes Risk - Jul 08, 2008, 16:00 Higher levels of fetuin-A were linked to later disease development, study found
. |
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.
Related Images
Allergic Reactions Allergic Rhinitis Allergies Antibodies Conjunctivitis Dust Mite-Proof Pillow Cover Eye HEPA Air Filter Histamine Is Released Hives (Urticaria) - Close-Up Hives (Urticaria) on the Arm Hives (Urticaria) on the Chest Hives (Urticaria) on the Trunk Intoduction to Allergy Treatment Recognizing Invader Yeast and Mold
Related Articles
Allergic Conjunctivitis Allergic Rhinitis Allergies Allergy to Mold - Dander - Dust
 |
Review Date : 7/5/2002
Reviewed By : A.D.A.M. Medical Illustration Team
|