I know 'altered sense of touch' is one of the symptoms of B12 deficiency, but can't find any posts about this. I have gradually lost surface sensation all over my body so that, for example, if I put my hand on my arm, I can feel my arm with my hand, but not feel my hand with my arm. I can still sense temperature, some pressure and vibration but normal 'touch' is gone. This started at the top of my back and has gradually spread from random starting points to cover my whole body in the space of about 4 years. It's quite creepy and is getting worse, but I've not been able to find any reference to this anywhere. Think my neurologist thinks it's my imagination. Does anyone know if this is what is meant by the 'altered sense of touch' on symptoms lists?