If your condition is not that serious, you can apply to some home remedys. First of all, you can apply to ice bags on the black eyes. It is effective to reduce the swelling and constrict the blood vessels and prevent bleeding. Three times a day and hold on to several days will help you get rid of swelling and pain.
Secondly, it is also necessary to get more Vitamin C foods in your diet. For example, peppers, sweet potatoes, lemons, broccoli, mangoes and oranges are all rich in Vitamin C. These foods will quicken the step of healing up.
At last, you should take enough sleep, and if your condition have not been improved for several days, you should see a doctor.
Hope helpful for your consideration.