Herniated spinal discs - Where do disc prolapses occur?

In this video, I talk a about the basics of spinal anatomy and the common locations where disc herniations occur. Disc herniations, or disc prolapses, most commonly occur in the lower lumbar spine. They can also occur in other spinal locations including the neck and thoracic spine.
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This video provides general information about spine and neurosurgical conditions and is not intended to be specific medical advice related to your current medical condition. The information provided is Dr David Oehme’s opinion.
Any surgical or invasive procedure carries risks. Before proceeding, you should seek a second opinion from an appropriately qualified health practitioner.

[@gregzade5202]

Hello Dr Oehme,
My partner Fiona and I live up in Brisbane, she has, Central disc protrusions affecting L4/L5 and L5/S1 discs.
The central L4/L5 disc protrusion is minimally changed in size from
previous, but is associated with increased T2 signal consistent with
progressive annular fissuring. The L4/L5 disc protrusion impresses the
thecal sac and potentially irritates the forming right L5 nerve root in the
lateral recess. Only back pain, this report was dated on 2021-11-09 09:29.
About a month ago the back pain returned only this time with chronic back and leg pain.
We are with health cover since last September, naturally there is a waiting period for surgery which she needs. As she is bed-bound and struggles to go to toilet and heavily medicated.
Our concern is since the MRI report back on the 11/09/2021 and our latest MRI report a few weeks back, is if this would be considered pre-existing condition? Or would it be seen as a new condition due to not having the leg pain? Much appropriated in advance. Greg

[@rachitgautam7424]

Sir, I'm 21 years old (male), i had L5 S1 lumbar disectomy 6 months ago, i was a boxer and did weightlifting too, i don't feel pain (although sitting, standing or walking for too long causes pain in leg and spine muscles which forces me to lie down ASAP) and i live with all the precautions so could i start my exercise and workouts slowly. Or should i wait for some more months or years?