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An allergy is a hypersensitive disorder of immune system.

An allergy is a type of reaction of the immune system. Substances that often cause allergic reactions are pollen, dust mites, mold spores, pet dander, food, insect stings and medicines.

Types of Allergies

The body's defense mechanism works over time to react against these foreign particles (known as allergens), which may pose danger to normal functioning of the human system. People with allergies have an exaggerated response of the immune system. However, in most allergic reactions, it is responding to a false alarm.

Allergies can cause a running nose, sneezing, coughing, itching, skin rashes or asthma. Symptoms vary from person to person and with the type of allergen. Rarely, allergies can set in a severe reaction called anaphylaxis, which is life-threatening.

Allergies can develop at any age and the risk of developing allergies is often related to the presence of allergies in the parents.

Together with the help of physical examination, history and allergy testing, the doctor can diagnose the cause of allergy and design treatments that will help the patient feel better.

Avoiding the allergen or minimizing the exposure is the most effective preventive measure against allergies. Antihistamines, glucocorticoids, anti-cholinergic drugs and decongestants help to alleviate the symptoms of allergy. Adrenaline is used to treat severe allergic reactions called anaphylactic reactions.

Immunotherapy can either reduce the severity or eliminate hypersensitivity reactions. This is done by vaccinating the person with progressively larger doses of the allergen in question.

For this general concept of the changed capacity for reaction, I propose the term "allergy". "Allo" denotes the deviation from the original state, from the behavior of the normal, as in "allorhythmia","allotropy".
- Clemens Peter Pirquet von
Cesenatico, 1906

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Bon19 Monday, April 27, 2015

I was diagnosed with shingles three weeks ago, the medication gave me an allergic reaction, I am still taking more medication because my head will not stop itching and my ears are swollen, I have never felt so rough

jamesmathew389 Monday, April 8, 2013

The allergies can be different as the causes for it appears to be different but if not treated properly may causes serious problem on body. 24 Hour Emergency Room Houston

crystal79 Sunday, August 19, 2012

I just noticed faint white sploches on my legs and upper thighs look like polka dots,dime size and some smaller.Some of them have tiny red pimple like spots in center. when i rub my legs they disapear for a second and then slowly reappear.I am someone that my feet will turn purple easy and i have sensitve skin as iam getting older i'am 32 years old female.Have been spending more time outside could it be an allergy.

ashokmay1956 Thursday, February 23, 2012

I am Suffering from skin allergy since last years leo citrazine tablet give relief for 3 days kindly suggest remedy

Hashim21 Sunday, December 25, 2011

One year ago i have developed hair dye allergy which troubles me as asthama attack, reddish eyes etc. So i changed another dye which gives me very mild asthama but more skin itching on scalp etc.. I am in contact with doctors. Advise me more !!

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