A defensive maneuver in which one or more linebackers or defensive backs, who normally remain behind the line of scrimmage, instead charge into the opponent's backfield. However, in the 3-4 defense, one linebacker typically rushes the passer with the three down linemen.
Blisters are commonly caused by friction from tight shoes, herpes, chicken pox, poison ivy and allergic reactions. More uncommon are disorders that only cause blisters on the hands and feet. See your doctor for an accurate diagnosis if you have blisters on your hands and feet, particularly from an unknown cause.
Although the cause of cold hands can be as simple as being in a cold environment or your body's natural response to maintain its normal temperature, if you have ongoing problems with cold hands, there could be a number of causes. Having cold hands could signal a problem with your blood circulation or the blood vessels in your hands. Causes of cold hands include: Anemia. Buerger's disease. Diabetes. Frostbite. Lupus. Raynaud's disease.