How To Treat A Bang On The Knee Please Help With Knee Pain?!?

Please help with knee pain?!? - how to treat a bang on the knee

I hurt my knee for hockey on Sunday and injured, because there is no problem ... I have a knot as big as my fist in his face was swollen around my knees and half my thigh. I can not bend much, and suffers constantly. Whenever I hear my knees make noises to break. I can not climb stairs. My knee occasionally "there", which means that the loop and accidental fall. Contractions too long, the type of spasm.

What is wrong with my knee? How is it treated? Is it worthwhile to consult a doctor? and any other information that you have that you would feel would help are greatly appreciated.