Hi, Noted your history of weakness in legs, lots of pain, unable to walk and so on. This looks to be related to wither nervous system or vascular system. This can be diagnosed by the following ways: First of all consult your regular Doctor for clinical evaluation and examination so that a proper clinical diagnosis can lead to further proper opinions of Specialists and relevant investigations. For example, if the cause is vascular then you need color doppler studies of lower limbs and abdominal arteries and veins. If Neurological cause is found, then MRI of the spine, nerve conduction studies, relevant tests of blood and an opinion of a Neurologist or Neurosurgeon as the case may be should be done. All these things will lead to a proper diagnosis so that an appropriate management can be done to get a proper cure. Surgical intervention is needed in some cases and if needed go for it. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. T. Chandrakant, General Surgeon