Slipped disc patients will need surgery in about 20% of the time. Most slipped discs can be managed with conservative treatment.
Surgery is indicated if
1) there is bladder or bowel symptoms (cauda equina syndrome)
2) nerve injury - manifested as weakness in the foot or ankle, persistent numbness in the foot or calf
3) severe pain that is not alleviated with conservative treatment over at least 4 weeks. Pain is severe enough to affect their daily lives.
4) if the patient has to work in remote locations and has been having recurrent severe symptoms. These patients cannot afford to have a severe attack of sciatica while out in the field with difficulty getting good medical help.
