[@Themerlinhawk] Losing both doesn't make sense though.

If Vedika's powers are essentially the metaphysical concepts of "self vs other" given physical consequences, then the touch sense would be the body's ability to physically perceive the "other", whereas proprioception is the ability to physically perceive the "self".

My understanding of what is going on is that Vedika's subconscious perceived an invasion by the "other" and attempted to fight it off, but because she has apparently never been "invaded" in this way before, it couldn't understand what was going on and overcompensated by turning off her sense of touch (along with a couple other senses like pain and probably temperature, if Stern's post is any indication). Kind of like when your body tries to fight off a virus that it has never been exposed to before by increasing your internal temperature to literally burn out the invader. 

If proprioception is the physical ability to perceive the "self", then by turning it off Vedika's subconscious is literally rejecting her own "self".

[@Stern Algorithm]