Today, the use of platelet-rich plasma is increasing in clinical practice in various fields of medicine. The plasma therapy is used by dermatologists, dentists, gynecologists, traumatologists and many other specialists in daily practice. Platelet-rich plasma is actively used in dermatology after its clinical effectiveness has been established. The plasma therapy method alone, as well as in combination with other methods of treatment, has shown advantages in certain skin diseases: androgenetic alopecia, alopecia areata, chronic vitiligo, melasma, inflammatory nail disorders, psoriasis, acne, post-acne and seborrheic dermatitis. Platelet-rich plasma can suppress cytokine release and limit inflammation by interacting with macrophages, improving tissue healing and regeneration, promoting the formation of new capillaries and accelerating epithelialization. Plasma platelets also play an important role in the host’s defense mechanism at the wound site by producing signaling proteins that attract macrophages. Blood plasma also has antimicrobial activity against Escherichia coli, Staphilococcus aureus, Candida albicans and Cryptococcus neoformans.