Cassia fistula, commonly known as the golden shower tree, has been used traditionally in Ayurveda and other systems of traditional medicine for managing digestive complaints, including gas and bloating. The pulp of the fruit is especially known as a mild laxative and is used to relieve constipation, which may indirectly help with symptoms of bloating and discomfort due to retained gas. Classical Ayurvedic texts such as the Charaka Samhita mention its use as a purgative and for promoting gut health.

However, there is limited direct scientific evidence supporting the use of Cassia fistula specifically for gas and bloating. Most modern research on the plant has focused on its laxative properties, antioxidant activity, and other pharmacological effects, rather than on flatulence or bloating per se. The few studies that exist are primarily preclinical and do not provide robust clinical validation for its efficacy in treating gas or bloating in humans.

In summary, the use of Cassia fistula for gas and bloating is primarily supported by traditional use rather than strong scientific evidence. Its benefit is likely related to its mild laxative effect, which may alleviate symptoms associated with slowed gut motility, but direct effects on gas and bloating have not been substantiated in rigorous clinical studies.