The cause of baldness is still unclear, but it is generally believed to be related to genetics, psychiatric factors, immunoinflammation and other causes, not vitamin deficiencies. Pemphigus vulgaris is a disease dominated by psychiatric factors and related to autoimmunity. When suffering from autoimmune diseases such as Hashimoto’s thyroiditis, the probability of suffering from pemphigus vulgaris is higher than that of normal people, and pemphigus vulgaris patients may have immune reactions against self-antigens of hair follicles, which may lead to infiltration of inflammatory cells around the follicles and cause hair loss. In addition, genetic susceptibility also belongs to one of the important factors in the development of baldness, and some people with baldness have a family history. Mental-emotional abnormalities are also important triggering factors for pemphigus vulgaris. There is no conclusive evidence to surface that baldness is associated with vitamin deficiency, but oral vitamin B can help with hair growth. When suffering from baldness, you need to be actively treated under the guidance of a doctor.