A lot of dermatology and neurology are very closely linked. Embryologically, the nervous system and majority of the skin/it's appendages are derived from the ectoderm.
Some textbooks have chapters dedicated to neurology and skin. Most derms have quite a thorough knowledge about this.
I have heard of derms specializing in the management of pruritus, which involves various sensory receptors, but I'm not sure whether they exclusively deal with this.