I have a bump on my ankle when i sprained it how can i get that bump away?

I was skating and jumping off 8 stairs and i landed bad and rolled my ankle so i went to the hospital and they told me that i streched my ligaments on my ankle.its been 3 weeks and its improved alot its does not hurt anymore only a tiny bit.But i still have the bump on my ankle and its not going away.i went to get a massage and still hasnt gone away i dont use my ankle brace nomore and just skate flatground.how can i get this bump away and summers here and i want to skate in summer!!!how can i make that bump dissapear please help!!:(