In order for your neck to move the way it should, all the neck muscles, tendons, and bones must be healthy and functioning properly. Your neck muscles contract to produce movement and are connected to your bones by tendons. If you injure or overexert your neck, you can temporarily or permanently damage muscles, causing pain and a reduction in your normal range of motion.
Torticollis, also known as "wry neck," is a painful disorder of the muscles in the neck. It occurs more often between the ages of 30 and 60, and is twice as common in women as in men. The condition involves an occasional or constant painful spasm of the large muscles of the neck and usually affects one side more than the other. When a person's neck is in spasm due to torticollis, they may be forced to rotate and tilt their head forward, backward, or sideways. Some people find that the pain becomes worse when they sit, stand, or walk.
Torticollis is quite rare, affecting only 1 in every 10,000 people. It's extremely painful and can be very debilitating.