Torticollis is a chronic condition in which the neck muscles contract involuntarily. This causes the head to turn and tilt to one side, and the chin to point to the opposite side. Sometimes one shoulder is lifted. The muscle contraction may be constant (fixed) or may come and go (intermittent). The abnormal posture caused by tilting the head may lead to neck pain.
Torticollis may be present at birth (congenital) or develop later in life (acquired).