Quebracho (Schinopsis spp.), a hardwood tree native to South America, has been used traditionally in folk medicine for various conditions, including as a topical agent for minor wounds such as scratches and abrasions. The traditional use is primarily based on its astringent properties, attributed to its high tannin content. In folk practices, powdered bark, decoctions, or infusions made from Quebracho have been applied to the skin to help dry out and protect superficial skin injuries, ostensibly promoting healing and reducing the risk of infection.

However, there is limited scientific validation for these applications. While the astringent action of tannins is recognized in general, and tannins can help to contract tissue and form a protective layer over wounds, there are no robust clinical studies specifically evaluating Quebracho bark for scratches or abrasions. Most available references are ethnobotanical or historical, documenting traditional uses rather than providing experimental or clinical evidence. Thus, the evidence supporting its use for this purpose is mainly traditional, with a moderate level of plausibility based on the known properties of tannins, but lacking rigorous scientific support.