Hi I am Dr Ramez Mohamed. I had gone through your question and understand your concerns. I think you suffer from inflammation or some erosion in the cartilage of your back which cause severe pain in the back this erosion may cause pressing on nerves that feed the both thighs may lead to inflammation in the sciatica nerve. You at the beginning must get an X-ray on the back and the MRI scan to detect the defect. - You have to take anti-inflammatory, multivitamins and extender of the muscles, which will reduce the pressure on the origin of the inflamed nerve, painkillers if necessary and wearing belt for the back in order to reduce friction cartilage together - You have to make your back is always in an upright position while you do your daily exercise routine and it also will reduce the sense of pain. Hope the above information helps you, and if you have additional or follow up questions then please don t hesitate in writing to us. I ll be happy to answer your questions.