Normally, a slipped disk is not caused by an accident. Some are, however.
Most slipped disks disappear in time without treatment. They cause pain for 6-12 weeks, which is best treated with standard pain medication. Prescriptions through your general physician. In some cases, there is a neurological deficit like paralysis or incontinence. If so, this should be addressed by a neurosurgeon. If there is no or minimal neurology, there is no reason to operate on your mother.
I hope I have informed you to your satisfaction,
Met vriendelijke groet,
Dr. R.H.G.P. van Erve, orthopedisch chirurg
Resumption of activity depends on resolution of symptoms.