The use of ash as a treatment for abrasions is primarily justified by traditional practices rather than modern scientific validation. In many traditional medical systems and folk remedies worldwide, wood ash or plant ash has been used as a topical agent for wounds, including abrasions. Historically, ash was believed to have antiseptic properties and was applied to minor wounds to help stop bleeding, dry out the area, or prevent infection. The alkaline nature of ash and its ability to draw moisture may have contributed to its perceived effectiveness in pre-modern contexts where alternatives were limited.

However, scientific studies examining the efficacy and safety of ash for wound care are extremely limited. Some research highlights the potential risks associated with the application of ash, such as contamination with pathogens or heavy metals, which could increase the risk of wound infection or delay healing. Modern wound care standards strongly discourage the use of unsterilized natural materials like ash due to these safety concerns.

In summary, while the use of ash for treating abrasions has roots in traditional medicine, there is little to no robust scientific evidence supporting its efficacy or safety. Its application is largely historical and not recommended by contemporary medical guidelines.