Vitamin B6 Deficiency - Disorders of Nutrition

Symptoms of Vitamin B6 Deficiency In adults, vitamin B6 deficiency can cause inflammation of the skin (dermatitis) and a red, greasy, scaly rash. The hands and feet may feel numb and prickling—like pins and needles. The tongue may become sore and red, and cracks may form in the corners of the mouth. People may become confused or irritable.