• Contrast bath---It is a form of treatment where a limb or the entire body is immersed in warm water followed by the immediate immersion of the limb or body in ice water. This procedure is repeated several times, alternating hot and cold. Note that the treatment should always end in the ice water, as heat will induce the body's inflammatory response, while cold helps to decrease inflammation.

Swelling is common upto six months

As the ankle was immobilised for this much time thus presence of post cast stiffness is there that can be treated by Physiotherapy. As Ankle is the main weight-bearing joint therefore consult a sports physiotherapist as soon as possible.