Hi i am Dr Ahmed Aly thanks for using HealthcareMagic site , I had gone through your question and understand your concerns .. I hope you feel better soon , in my opinion i don t think that your stomach pain is related to your low back pain and hip pain . the gastric pain maybe due to eating any type of foods or drinks that cause gastritis . Your low back pain and hip pain maybe relted to muscular spasm or sciatica due to nerve compression . in many cases pain subsides simultaneously without medications only with rest . Try to avoid over weighing , heavy lifting , obesity , vigorous movements and bad sleeping or sitting postures . Physiotherapy is very beneficial you may use hot massages with topical anti-inflammatory gels and take painkillers like advil tab when needed , vitamin B12 supplements and muscle relaxants will be effective in most of cases . If pain persists i recommend further investigations like MRI spine and follow them up with your physician 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.