How long can spinal stenosis n ruptured discs press on nerve roots before causing permanent damage?

Rare: Permanent nerve damage is very rare, despite long standing pressure. Sometimes some numbness remains, but weakness and pain almost always disappear. Chack with a local spine doc you like and have them review your films- and MRI with you so you understand everything well!

Depends: Intense pressure can damage nerves instantly. Permanent damage may result if the nerves are not decompressed on time. Often, even large disc herniations may occur without any neuro damage to speak of. Ask your local neurosurgeon for an evaluation to discern if any nerves are at risk here.