- product processing of the outer part of birch bark.
Thick oily liquid, contains phenol, toluene, xylene, resins and other substances. Applied externally in the treatment of skin diseases in the form of 10-30% ointments, linimentov. The therapeutic effect arises not only as a result of local action (improvement of the blood supply to the tissues, enhancement of keratinization processes), but also in connection with reactions that occur during stimulation of the skin receptors. As a component, it is included in the ointment of Wilkinson, Vishnevsky, etc. With prolonged use of tar, skin irritation and exacerbation of the eczematous process can be observed.