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.
Up to several weeks: Hand, foot and mouth disease is a viral infection caused by a strain of coxsackie virus. It causes a blister-like rash as the name states on the hand, foot and mouth. A person is contagious when the first symptoms appear and until the blister-like lesions disappear.