Tip About Types of Allergies

Allergy can be defined as a hypersensitivity immune response to some people who have contact with certain substances called "allergens." That is, when inhaled, ingested or touched. The genetic and environmental factors are an important factor for the development of allergies. Symptoms can range from mild discomfort to the problems that threaten their lives. There are different types of allergies, the most common are food allergies, pollen, dust mites, insect bites and allergies to animals.

An allergy is an overreaction of the immune system to a substance that is harmless to most people. But in an allergic person, the immune system treats the substance (called allergens), as an invader and reacts inappropriately, causing symptoms ranging from mild discomfort for problems that may endanger a person's life.

The immune system of an allergic person, in an attempt to protect the body against what it perceives as a threat, produces antibodies called immunoglobulin E (IgE) against the allergen. In turn, these antibodies cause cells to release chemicals including histamine mast, into the bloodstream to defend against the allergen invader.

The tendency to develop allergies often have a hereditary basis, which means you can "broadcast" from parents to offspring through genes. However, the fact that you, your spouse or a child is allergic to something does not mean that all children must necessarily inherit some kind of allergy. In addition, a person usually does not inherit a particular allergy, just have a tendency to have allergies.

However a child may have allergies though no other family member is allergic.