I have advanced Stenosis of the spine. Basically I have 3 discs that have collapsed due to heredity, age and not being kind to my back over the years, all this was dicovered by a fall at work in 08, landed flat on my keester and instant spasms.
I spent 8 months out of work only to be told short of fusing my vertebrae there wasn't anything really that could be done.
It flares up at times, I can do something as silly as set down the dish for the cats and next thing I am on my back for a week.
My issues are mainly nerve related which you can't do much about but a couple things that have helped:
Hot bath/shower
Gentle walking
Gentle stretching
Massage
Firm mattress (I will sleep on the floor sometimes)
Drink LOTS of water.