Abstract
alopecia is a pathological loss, manifested by the loss of more than 100-150 hairs per day. The causes of hair loss in the modern world can be a variety of factors: stress, hypo- and beriberi, unbalanced nutrition, endocrine pathology, micro- and macroelementoses, taking medications, etc. Such a variety of etiological factors causes a significant prevalence of alopecia in the general population. Demographic studies have shown that worldwide 2.25-4.5 million people suffer from this pathology. The constant increase in the number of people with excessive hair loss is becoming an increasingly urgent problem in dermatology and aesthetic medicine. At the same time, the macro-signs of hair loss are well studied and widely described, and data on the characteristic microscopic changes in the follicles and hair shafts in patients with various types of alopecia are practically absent in the literature.