Sleeping in a moving vehicle may cause minor Whiplash, also called neck sprain or neck strain, is an injury to the neck. So, don’t sleep without neck support while traveling.
Whiplash causes pain, tenderness, stiffness and loss of movement in the neck. You may also experience headaches, muscle spasms and pain in your arms or shoulders, the symptoms of whiplash often take a whole six to 12 hours to develop but it may be longer.
Don’t Sleep In A Moving Vehicle