How To Get Relief From Severe Ankle Pain And Numbness?

I had severes ankle pain on Thursday and went to hospital. I hadnot fallen or damaged my foot. Now thepain has becomes a soreness and the sole of my foot is squidgy and completely numb. I am 57, female, 5ft 11 ins and weigh 12 stone. This andke was damaged by a horse falling on top of me in my 20s but has not caused any concern for many years