question: MY WIFE HAD A DISC OPERATION 5 YEARS AGO  SINCE SHE IS BIT STABLE BUT SOME TIME WHEN SHE IS HARD WORK (HOUSE HOLDING WORK)THEN SHE FELT AN UNEASY AND TIREDNESS THERE AFTER SHIVERING HER HEAD FOR FEW HOURS AND ALSO SWELLING HER COLARBORNE'S  BOTH SIDE her L5 disc has been removed due to damage .. DOCT PLS ADVISE WHT'S IS THE REASON IT HAPPENING.