The use of the Asoka Tree (Saraca asoca) for treating external bleeding is primarily rooted in traditional systems of medicine, particularly Ayurveda. In classical Ayurvedic texts, Asoka bark has been referenced as having hemostatic properties, meaning it is believed to help stop bleeding. The bark is commonly used in formulations for gynecological disorders (such as menorrhagia and metrorrhagia), but there are also mentions of its topical use for external wounds to control bleeding and promote healing.

While there is a longstanding tradition of using Asoka bark for bleeding, the scientific evidence for its efficacy in external bleeding is limited. Some phytochemical studies have found that Asoka bark contains tannins, flavonoids, and glycosides, which are known for astringent and wound-healing properties. These constituents could theoretically contribute to vasoconstriction and promote clotting when applied to wounds. However, most of the available research focuses on its use for internal bleeding and menstrual disorders, with very little direct clinical or experimental data on external application for bleeding in humans.

In summary, the use of Asoka Tree for external bleeding is largely tradition-based, supported by historical usage and some plausible phytochemical activity, but lacks robust scientific validation through modern clinical trials.