I'd agree with that and add that perhaps the bike isnt the correct size. I had the same issue and after spending $225 on fittings it was determined that I needed a smaller frame. After test riding a few I did end up with a 53cm instead of a 54cm. Everything feels better now, neck, shoulders etc. There still is some slight numbness, which I think everyone experiences from time to time, but it is significantly reduced from what it was previously.