Niacin deficiency, also known as pellagra, is a multiple nutritional deficiency primarily caused by a lack of niacin and tryptophan.

bubble_chart Diagnosis

Main manifestations

(1) Symmetrical dermatitis, with skin lesions presenting as erythema, erosion, thickening, and ichthyosis; (2) Glossitis, diarrhea; (3) Frequent symptoms include depression, irritability, insomnia, headache, vertigo, memory loss, and even dementia; symmetric burning and numbness in the limbs, with paralysis occurring in severe cases.

bubble_chart Treatment Measures

Treatment for

Avoid sunlight exposure for those with dermatitis, maintain oral hygiene, correct water and electrolyte imbalances caused by diarrhea, and administer nicotinic acid orally, intramuscularly, or intravenously at 400-1000 mg/day until symptoms subside.