slip disc (sciatic nerve problem)

hi all,

my mother has severe low back pain. she has consulted many neurophysicians as well as orthopaedic doctors. and all of them have diagonised my mom's problem as slip disc.the doctors have asked her to do some exercises and maintain healthy weight, which she is taking care of.please can someone tell if she has to undergo an operation,it's effects or how she can control the problem.because, the doctors tell it is a major operation, we want to avoid it.also, the doctors are not giving any assurance that the problem will be solved after surgery.

also, does anyone know some good doctor in bangalore who treats only slip disc cases.your information will be very helpful.thankyou.