Re: 13 days post-op & feeling great
There are sitting restrictions because sitting is the worst thing you can do for your spine. It puts 30% more pressure on the discs than any other position. After discectomy, you want as little pressure on the discs as possible, so the time is limited.
Driving is two-fold: people technically shouldn't drive if on pain medications.
Second, you are sitting in a cramped position, riding in a bumpy and jarring vehicle--after surgery the tissue is delicate for a long time -- the risk of reherniation is greatest during the first six weeks, but the disc doesn't really "scab over" and become relatively tough until six months.
When one has been in pain and unable to pursue normal activities and this pain is relieved by surgery, it is hard to not want to run out and do everyhing that hasn't been possible. So this can be a very challenging time for the patient...but you need to be very careful to not over-do.