The use of the Asoka tree (Saraca asoca) for canker sores (aphthous ulcers) is primarily rooted in traditional medicine, especially Ayurveda. In Ayurvedic texts, the bark and flowers of the Asoka tree are commonly cited for their astringent, anti-inflammatory, and wound-healing properties. Traditionally, these parts are used in various formulations to treat oral ulcers, including canker sores, owing to their presumed ability to promote mucosal healing and reduce inflammation. However, while these uses are well-documented in classical Ayurvedic literature, there is a significant lack of robust modern scientific research specifically validating the efficacy of Asoka tree extracts for canker sores.

Only limited laboratory studies have explored the general antimicrobial and anti-inflammatory effects of Asoka tree extracts, but none have directly assessed their impact on human canker sores in clinical settings. The evidence supporting its use is therefore largely anecdotal and traditional, without direct clinical trials or systematic reviews to confirm safety or efficacy for this indication. As such, while Asoka is a respected medicinal plant with a long history of use for various ailments, its specific application in canker sore management remains inadequately supported by contemporary scientific research.