Hi there.Slip disc or disc prolapse is condition where the cartilage between two vertebra bulges out of its normal position into spinal column leading to compression of spinal cord and nerve roots causing sensory and motor disturbances. Treatment of slip disc includes bed rest, pain killers. If this fails, like in your case and patient is having weakness, sensory loss or excess pain then better to go for surgery as if timely surgery not done then there are chances of losing sensations and at times ability to walk even. So go ahead with surgery. She is just 48 years, not so old even. So surgery is not contraindicated unless she has heart problem or serious comorbidities. If your very hesitant about surgery then you can try epidural steroid injection, which alleviates pain.speak to your orthopedician about it. Hope this reply helps you in your decision.