This is a test of commonsense. Complete the next sentence:

How to heal bruises fast
Apply ice for the first 48 hours.
A bruise is formed when a fall or blow causes blood vessels to break, causing blood flow to move to the skin's surface. When you first notice a bruise, apply ice right away.
Ice can help heal a bruise fast by constricting underlying blood vessels. An ice pack, a bag of frozen vegetables, or ice in a plastic bag can serve as a cold compress.