Hi i am Dr Ahmed Aly thanks for using HealthcareMagic site , I had gone through your question and understand your concerns .. From your given history you may have a kind of renal problem that may show back pain symptoms . it could be a kind of renal stone or gravel or it really could be a muscular back spasm or sprain . Try to have a high fluid intake , proximol sachets , avoid high salts and protein meals if pain persist i recommend urine analysis , U/S abdomen and pelvis to rule out any kind of renal dysfunction and urinary tract infection . If you had a muscular spasm use hot massages with topical gels , muscle relaxants , B12 vitamin supplements will be helpful for most of cases . If no progress visit your physician for proper evaluation and management to prevent further complications . 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.