Allergies are a common health issue that affect a significant portion of the population worldwide. Allergies are a hypersensitive reaction of the immune system to an otherwise harmless substance, which is known as an allergen. The allergen can be any substance that triggers an allergic reaction in the body, such as pollen, dust, food, or animal dander.
Allergies are caused due to the abnormal response of the immune system, which mistakes a harmless substance for a harmful invader and initiates a defence mechanism, called antibodies, to protect the body from it. This results in various allergic reactions, such as skin rashes, itching, sneezing, watery eyes, and in severe cases, anaphylaxis.
