Hi this is Dr Mathur from Fortis C Doc Hospital, New Delhi. As far as your pain is concerned, is it in the back primarily? Does it go from the back of the thigh all the way to the foot or isolated in the joints only? Anytime of the day is it more? Does any activity aggravate it? Do you have any numbness or tingling in the lower limbs? Do you have any fever or lethargy? Is your appetite OK? Any loss of weight in recent past? Any other joint pains? Is only left or right lower limb involved or both? Any recent blood tests or x-rays been done? The answer to these questions will help me better understand the cause and origin of pain.