Summarize this article:

Bromelain, a supplement derived from pineapple stems, may help reduce bruising and swelling by breaking down blood proteins. You can also take it after bruising to try to speed up the healing process.  Try one 500-mg pill or two 250-mg pill supplements each day. Talk to your doctor before trying this supplement. Arnica montana is a natural remedy for bruising that is used to reduce swelling and inflammation. You can take supplements to minimize bruising. Talk to your doctor before taking arnica. If you have a bruise, you can apply arnica ointment or gel to it, which has been proven effective to treat bruising. You can purchase it at the drugstore. Apply it to the bruise daily to reduce the bruise and inflammation of the skin. Adding certain supplements to your diet may help reduce your risk of bruising. Taking vitamin C, hesperidin, or rutin may help. Try 400 mg of each supplement. Make sure to talk to your doctor before starting any supplements. You can also eat more foods containing vitamin C and flavonoids. Vitamin C is found in citrus fruits, greens like spinach, strawberries, tomatoes, peppers, and broccoli. You can get flavonoids from carrots and apricots. If you are bruising easily, you may want to limit some of your supplements. Vitamin E, ginseng, gingko biloba, ginger, and garlic are all blood thinners and can increase your chance of bruising. Limit how much you take these supplements. If you are going to have surgery, stop these supplements a few weeks before the procedure.

Summary:
Try a bromelain supplement. Take arnica. Take supplements to help with circulatory health. Avoid blood thinning supplements.