Thumb knucklewas stomped and rolled over during a derby bout and now it is swollen, incredibly sore I have no movement at all a month ago no improve.?

Trauma. Your sx and duration suggest significant tendon bone injury need xrays and tx.
Strain or fracture. If the joint is still swollen and painful after a month, you should get an x-ray. You may try wearing a thumb splint and taking anti-inflammatory medications, as well as icing the joint for some relief.