Lots of accidents can cause whiplash, from a slip and fall to a sports injury, but the most common cause of whiplash injuries is auto accidents. As it pertains to a car accident, the most common cause of whiplash is a rear ended accident, where one car hits another from behind. When this happens, the impact of one car striking another from behind causes the body, followed by the head, to jerk violently forward and then back in a whipping motion, putting severe stress on the neck muscles. Whiplash can sometimes be caused by a side impact (t-bone accident) or a head on collision, but the sudden forward to backward motion caused by a rear end car accident is much more common. In most cases, whiplash will go away on its own within a couple of months, but severe cases of whiplash can last months or even years, and may require surgery.