The most common chronic condition worldwide is Allergy. The symptoms of an allergy range from making an individual miserable to putting them in life-threatening conditions. An allergic reaction begins in the immune system so when allergy occurs the immune system mistakes an otherwise harmless substance as an invader this substance is called an allergen. The immune system overreacts due to allergens and overproduces IgE antibodies and travel to cells hence releases histamines and other chemicals causing allergic reactions.
There are several types of allergens that can cause allergy to an individual. Few of them are:
The doctor might ask the patient about medical history, food habits, travel history, etc
Following tests may also be prescribed by the doctor: