Suggest Treatment For Bruising On Ankle After An Injury

A lad fell over today onto my leg and landed on my ankle making my go over on it, his full weight was on it and there was a loud and very painful pop. The pain for about an hour afterwards was massive. It has since subsided after a few hour and I can hobble on it. It didn't really swell but there is some bruising coming on the bone that sticks out on the ankle and is spreading up my calf. I cannot twist my ankle or shift weight into my toes.