An allergy is the body's response to a substance which is not necessarily harmful in itself, yet causes an immune response - an allergic reaction. These allergic reactions generally occur when allergens (the substance causing the reaction) is present within the surrounding environment.

An allergic reaction tends to aggravate the senses and could present itself as a runny nose, sneezing, itchy eyes, swelling of any kind, or perhaps a visible rash on the skin. When an allergic reaction takes place, the immune system has produced antibodies to attack the invading substance which in turn promotes blood cells to release chemicals, such as histamine.

In some cases, the immune system may overreact and cause a severe allergic reaction such as anaphylaxis - a reaction that has a rapid onset and may lead to extreme disability or even death if not treated immediately. As an example, an increasing number of people have anaphylactic reactions when exposed to shellfish or after being stung by a bee or a wasp.

Some common allergens include pollen, dust mites, mould, animal dander or saliva, insects, chemicals often found in household cleaners, various foods and medicines. These allergens are generally protein-based. Non-protein allergens, such as the drug penicillin for example, requires being bound to a protein once it enters the body.

Whether you suffer from seasonal, food, or other allergies, Homeopathic remedies are often an effective method of treatment and can cure these hypersensitivity disorders.