As someone who doesnt like to be touched, no matter who it is, it can be a bit uncomfortable. I dont mean in the sense that "ew," more in the ways of "my skin doesnt feel mine anymore." Many reasons as to why, majority of them being trauma. Whether it's PTSD or Autism (cause the two are not the same but can be vulnerable). I'll be surprised if she doesn't hyper-focus on her skin and clenches her fist or something further along or at least rub her arm to assert dominance in her own skin.