Severe lower back pain, hip (most commonly the left side) & pain radiating down mu left leg prior to a BM. So much so it is difficult to get out of bed. This generally occurs in the mirnings & seems to subside follwing going to the bathroom. I have had L5S1 surg in 2002 & am on pain medication due to chronic back pain already, however this is a different type of pain.
Hi I am Chat Doctor. .  In my opinion that could be a kind of sciatica due to nerve compression, from your past history of L5 surgery in 2002 I think it is the most liable cause of such radiating pain.  For my patients I may suggest avoiding heavy lifting, vigorous movements, B12 vitamin supplements, with painkiller, muscle relaxant, hot massages with topical gels will help. Please click and consider a 5-star rating with some positive feedback if the information was helpful. Wish you good health, Any further clarifications feel free to ask.