Hello, Thanks for writing to us From description it seems to be soft tissue injury . Large lump might be due to haematoma formation(collection of blood). You need an x-ray to rule out any bony injury. I suggest you to consult an orthopaedician nearby for a detailed examination. You may get the X-ray of the area affected under his/her guidance.Beside icing and elevating it, you can take anti-inflammatory drug like motrin to reduce pain and inflammation. Avoid putting weight and rest well. Hope this helps you. Let me know if you have any more concern.