Doctor said I have lumbar spondylosis, mass effect right L4 L5 nerve root, but left leg numb and dr did epordiaol injection on left L5S1 why?

Please repost. Please repost and include the answers to your questions given to you by the doctor who made the diagnosis and did rhe injection; or, if you did not ask the doctor, please state why you did not ask him/her and why you're posting the question for online doctors who have no direct knowledge of your case.