The exaggerated response of the immune system to certain antigens present in the environment is called allergy. The substances to which such an immune response is produced are called allergens. The antibodies produced in allergies. Common examples of allergens are mites in dust, pollens, animal dander, etc. Symptoms of allergic reactions include sneezing, watery eyes, running nose and difficulty in breathing. Allergy is due to the release of chemicals like histamine and serotonin . Somehow, modern-day life style has resulted in lowering of immunity and more sensitivity to allergens . This could be because of the protected environment provided early in life.

What is difference between autoimmunity and allergy?

Allergy is mainly caused by external triggers while autoimmunity is internal.

Allergies:

A condition in which the immune system reacts abnormally to a foreign substance.

The allergies are mainly caused by external triggers such as pollens, certain foods, medicines, insects, animals, etc.

Examples include skin allergy, sinusitis, asthma, watery eyes, sneezing, and itchy nose and eyes.

Autoimmune Disease:

An autoimmune disease is a condition in which the immune system mistakenly attacks healthy cells and tissues of the body.

Autoimmune diseases are the results of an internal trigger to the body’s own cells.