I Fell Up A Curb A Couple Weeks Ago, Hit

I fell up a curb a couple weeks ago, hit and scraped my knee and deveoped a bump on the lateral side. initially used ice, which brought the bump/ lump swelling down. However,I still have the bump, which is hard to the touch with a spongy feeling area around part of it. There is absolutely no pain with this injury. Should I continue using ice? What do you think is going on? Thanks for your help.