Whiplash is a common term for a hyperflexion/hyperextension injury which occurs to the neck when flexing it. If you stretch your neck a bit more than you should, you are in danger of being injured. This action will tear the muscles and ligaments of the neck.

You may need to see your orthopedist if the pain is severe. Otherwise, a minor case of whiplash can be treated with an initial period of rest followed by gentle, neck exercises. Four simple and gentle neck stretches might do the trick:

Neck extension

Neck flexion

Neck rotation

Side flexion

Forceful impact or trauma to the bone can cause a fracture. High impact sports injuries are one of the reason for broken bones. Again, diseases that cause the bones to become brittle and weak leads to fractures. Sometimes, long-distance walking or running for a long period of time causes fractures as also falls, accidents, osteoporosis and tumors growing near the bone.

A crack or break in a bone is called fracture. It can be either complete or partial. If the skin is punctured by the fractured bone, then it is known as an open or compound fracture.