PRP therapy of the hairy part of the head is used as a preventive procedure for various types of hair loss, including seasonal, stressful and post-ovoid hair loss, deterioration of hair quality (thinning, brittleness, slow growth), diffuse and androgenetic alopecia, as well as to prepare the patient for hair transplantation (the course of procedures must be completed 10 days before the transplant) and rehabilitation after hair transplant.