Hi i am Dr Ahmed Aly thanks for using HealthcareMagic site , I had gone through your question and understand your concerns .. In my opinion you have a kind of sciatica due to nerve compression , actually these two symptoms are not related but bowel movements may exaggerate the pain sensation . For my patients i may recommend physiotherapy , hot massages , spinal straightening exercises will be helpful , painkillers like advil tabs when needed , gentle massaging with anti-inflammatory gels , B12 vitamin supplements , muscle relaxants will be effective for most of cases , in more severe and chronic cases steroid tabs or injections are prescribed . If pain persists i recommend MRI scan on your spine to exclude any spinal disc herniation and follow them up with your neurologist for proper evaluation and management. 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.