My dermatologist recommended DerMend bruise cream. (Someone put a scientific link for it above) It is OTC (but hard to find) and there is a generic option too. It is also on Amazon and eBay. It is very effective in preventing bruises if you rub it into the skin on your forearms or anywhere you tend to bruise. Also, if a bruise is already present, rub it onto the spot to prevent it getting worse and speeding up the healing process. It is amazing! Be sure to get the tube that is maroon and white and not the blue and white tube which is just regular lotion. If you have the big dark bruises that have been with you a long time, you may have to get medical help for those.