Envy
Researchers found that feelings of envy light up parts of the brain active in pain processing. Yes, envious people experience physical pain and bodily illness. The more envy, the more vigorously flared the pain nodes in the brain’s dorsal anterior cingulate cortex and related areas. Researchers found a neural pathway in the brains of envious people connecting envy and taking pleasure in other’s pain and misfortunes. That should tell you a lot about the character of those people.