MOVED FROM "DUST MITES"
A common trigger for indoor allergies. They are microscopic mites that live in the fibres of pillows, duvets, mattresses, blankets and carpet. They live off of our dead skin cells. Inhalation of their droppings can cause allergic reactions such as nasal congestion.
A substance that your body perceives as foreign and harmful; initiates the allergic reaction.
An exaggerated response to a substance or condition produced by the release of histamine or histamine-like substances in affected cells.
MOVED FROM "OUTDOOR ALLERGIES"
A chronic disease characterised by an overreaction of the immune system to certain proteins found outside, such as tree, grass, or weed pollens, mould spores, stinging insects, plants, etc. (also called "hay fever," "nasal allergies," or "seasonal allergies").
Severe, life-threatening allergic response that may be characterised by symptoms such as lowered blood pressure, difficulty breathing, vomiting or diarrhea, and swelling and hives.
Swelling similar to urticaria (hives), but the swelling occurs beneath the skin instead of on the surface. Angioedema is characterised by deep swelling that commonly occurs around the eyes and lips and sometimes of the hands and feet.
Specialised proteins produced by white blood cells that circulate in the blood. Antibodies seek and attach to foreign proteins, microorganisms or toxins in order to neutralise them. They are part of the immune system.
A substance, usually a protein, which the body perceives as foreign.
Medication that relieves symptoms of sneezing, itching, runny nose and possibly congestion by blocking histamine receptors.