Zster1--I would say a negative MRI means no MS since that is the new gold standard. You could ask your GP for a referral to a neuro, who may want to do an EMG to see if you have true peripheral neuropathy. Your issues sound sensory. Some neuropathies are small fiber and won't show up on an EMG right away.JRO--that may indeed be why your first EMG's were negative--small fiber neuropathy can cause lots of burning and numbness but not show up on testing. Eventually, it usually does because it moves into the bigger sensory nerves. Being strong physically is the most important thing, and focusing on the positives in your life. I have learned in the last few months that endless searching for answers not only causes more stress, but the answers you seek may never come. The medical community is rarely black and white when it comes to nervous system/autoimmune issues.To answer your question about twitching--I get brief twitches throughout the day. Sometimes it is one twitch in the bicep, several fast ones behind the knee, or on the instep of my foot. I have had them on my back and stomach, hands, lips, and my current hotspot that won't go away--my tongue. At night when I am going to sleep or waking up, I get those annoying jolt-like twitches like someone touched me with a cattle prod. Zap, then gone. The ones on my left hand have been the finer ones, the ones I can see, but not feel. Yet my strength in that hand is good on clincial exam. I have been freaked out about that hand, thanks to Dr. Google, so I have felt perceived weakness there. My neuro assures me that is my over-anxious mind playing its tricks. Same with my tongue. I do believe stress brought this on, and continues to feed it. Manage the stress, and I think we will both see improvements.