Hi Pawin,
MMN progresses very slowly. The weakness in my right hand, especially my baby finger, was obvious in 2002. At the same time I began falling a lot. The neuro at that time said I did not have a systemic disease like MS or ALS. I asked her specifically. I kept falling periodically and my legs and hips hurt more and more. By 2006 I could not move the baby finger of my right hand at all and was DX with ALS on Oct 31, 2006. Second opnion Dec 7, 2006 said maybe MMN and I started treatment Jan, 2007. Now a second finger is curling and I still have weakness in my right hand and my hand and both legs (especially the left leg) are weak and hurt, but that is still very slow progression. There is not suppose to be pain as such, but if I over do it, I get pain.
I hope this helps. Take Good Care, Peg