Sweet Violet (Viola odorata) has a longstanding history of use in traditional herbal medicine, particularly within the Unani, Ayurvedic, and some European systems. In these traditions, Sweet Violet is considered to have cooling and calming properties, and formulations containing its leaves or flowers have been recommended to soothe conditions associated with excessive heat or agitation, which can metaphorically include anger. For example, Unani medicine sometimes prescribes violet syrup or infusions for individuals experiencing irritability or heightened emotional states, categorizing these as imbalances of bodily humors.

However, there is little to no modern scientific evidence directly supporting the use of Sweet Violet for the treatment or management of anger, mood dysregulation, or related psychiatric conditions. Most modern research on Viola odorata focuses on its expectorant, anti-inflammatory, or mild analgesic actions, and not on its influence on emotional states. The traditional rationale is largely based on the doctrine of signatures and the observation of its perceived calming effects, rather than on clinical trials or biochemical studies related to anger or aggression.

In summary, the use of Sweet Violet for excessive anger is grounded primarily in traditional practice, with minimal or no scientific validation to date.