I have broken blood vessel on my ankle. what should i do?

Wear an anklet: Wear an elastic anklet (preferably one with an enclosed heel) during the day under your socks while you're in your shoes until it's better.

Depends on size: Depending on size of vessel and where located. If small and superficial, do nothing unless you want cosmetic surgery. If a large vessel you need to see a vascular doctor for advice.