Physical

  • dark skin patches
  • dark knuckles
  • dark eye area
  • peeling skin
  • redness
  • scaly skin
  • skin thickening
  • mouth sores
  • inflamed skin
  • dementia
  • diarrhea

Mental

  • apathy
  • dementia
  • headaches
  • depression
  • low energy
  • confusion
  • irritability
  • mood changes
  • anxiety
  • uneasy
  • restless
  • delusional
  • disorientation

Other possible pellagra symptoms include:

  • sores on the lips, tongue, or gums
  • decreased appetite
  • trouble eating and drinking
  • nausea and vomiting