Congenital insensitivity to pain with anhidrosis
Congenital insensitivity to pain with anhidrosis (CIPA) is a rare autosomal recessive disorder of the nervous system which prevents the feeling of pain or temperature and prevents a person from sweating. Cognitive disorders are commonly coincidental.
Source: Wikipedia — Congenital insensitivity to pain with anhidrosis (CC BY-SA 4.0)