In the initial 24 hours after an accident it is advised that you use an ice pack, or bag of peas wrapped in a towel on the back of your neck to reduce inflammation caused by whiplash. You can lay down and rest, using a pillow to support your head using the ice pack/peas for 20 minutes at a time for the first day or two. Do not prolong your bed rest, however tempting it may be. The longer your neck is inacti ...