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.
1 Hand, foot and mouth disease is caused by a virus (usually Coxsackie virus A16). 2  It causes blisters on the hands, feet, in the mouth. 3  Blisters can also be in the nappy area of young children.4  Hand, foot and mouth disease can be caused by several other viruses. The fever can be high, but often is mild. 2  Blisters on the hands and feet, and ulcers or blisters in the mouth appear 1-2 days after the first symptoms and may last for 2 â 7 days.