I have been preliminarily misdiagnosed as having MS; In better words, I have been shoveled over to MS neurology for many years with no clear diagnosis. 24 years ago I rode a bicycle for 34 miles on an adventure with my friend, We set off with no preplanning or training. 4 days after the bike ride I starting a tingling in my feet by the end of the week I was numb from the chest down, including my entire buttocks and outer vagina. I couldnt tell If I was finished when I went to the bathroom. Very almarming and hard to describe what I was feeling. Tightness pressure like my leg was turning to stone and hard underneath the surface. I could walk and had no muscle weakness. Numerous tests, from brain scans to lumbar fluid extraction and testing Limes disease 10 days of testing . Nothing was found I had mild inflammation in my spine. 24 years later I fell directly on my left buttstocks underside and butt check with my left leg slipped out on water. I started with severe sciatica pain then the numbness. 8 Dr. Visits 3 ER visits and they still point me in the direction of MS neurology. I have had no other episode in my life except these two events. Frustration led me to searching, I was not going to stop until I had an answer. I am having the same feeling with total numbness in my left leg from my tow to my abdomen. My left buttock and the left side of my vagina opening. After days of searching I found the most common and first diagnosis was cycling I was relieved. which of course reduced my blood pressure. I have never heard of an MS person or anyone describe the numbness in the anus region. I was not going to stop until I found the right information. I am refused all treatment I asked for, I am not willing to go thru another lumber puncture ....Unless of course it is only to prove them wrong that I DO not have MS. I am currently icing my L4 L5 and S1 including my buttocks and what I call my tailbone. Large doses of oral inflammatory medicine and I have ordered a lumbar brace Since the Pudendal nerve extends to S1. If there is other information advice or questions please feel free to send me a private message. My 24 years ago experience 1997 is documented at Mayo Clinic. I have been thru the UW in Madison MS neurology as well. I write this response for the benefit of others who may have similar issues