Pellagra,sever dermatitis in the sun exposed areas together with impaired cognitive functions and diarreah might be associated
This man has a disease called Pellagra. Pellagra is caused by a deficiency in Vitamin B3 (Niacin). Patients with pellagra usually have a diet that is rich in unprocessed corn. It can also occur in alcoholics due to malnutrition. The treatment is very simple, you just have to give the patients vitamin B3 or oral Vitamin B Complex .