The back of my ankle hurts a lot when i walk how can i treat it or should i go to the doctors ?

See your doctor: You may have injured your achilles' tendon. See your doctor.

See a podiatrist.: It sounds like your pain is coming from the achilles tendon. This is a problem that requires evaluation by a doctor. Until then, try wearing a shoe with a slight heel. This will relieve some of the stress on the back of your heel. Also, try putting ice on it.

Pain: I recommend you see someone to first identify your problem to properly treat it.