<prompt> When do you operate for a prolapsed discBusy executive needs quick surgeryOnly with weakness no painSevere paininterfering with activity and not relieved by rest and treatment of 8 weeksPatient of PID with difficulty in ambulation  <response>: Indications for surgery in cases of Prolapsed interveebral disc are:Progressive neurological deficitCauda-equina syndromeSevere sciatic tiltRefer: Mohindras Fundamentals of Ohopedics, 2nd edition, pg no. 234, 302 