I had a ganglion cyst pressed on & popped by my doc a few weeks ago. i have intense sharp pain now and feels as though i slept wrong on it. why?

Unclear: possible inflammation or infection- call your physician.

Ganglion returning: When the ganglion pops it does not eliminate the root. If it hurt it usually means that the ganglion is regrowing but not visible. The pain is from pressure. See a Hand surgeon.

See hand surgeon: Pain due to leaking synovial fluid from inside cyst. Need to have cyst remnants excised