Quad sets. 1  Sit with your leg straight and supported on the floor or a firm bed. (If you feel discomfort in the front or back of your knee, place a small towel roll under your knee.) 2  Tighten the muscles on top of your thigh by pressing the back of your knee flat down to the floor.
allergic reaction. allergic reaction in Medicine. allergic reaction n. A local or generalized reaction of an organism to internal or external contact with a specific allergen to which the organism has been previously sensitized. Examples from the Web for allergic reaction.
An allergy is a response by the body's immune system to something (called an allergen) that is not necessarily harmful in itself. Certain people are sensitive to this allergen and have a reaction when exposed to it. During an allergic reaction, a complex series of events occurs within the body.ome people who have had a severe allergic reaction or anaphylactic reaction in the past carry an adrenaline (epinephrine) pen. This can be self-injected or injected by a bystander, in the event of anaphylaxis. Anaphylaxis is the name given to an extreme form of allergic reaction.