Fennal is an aromatic herb. In 'Ayurveda', many medicinal uses for fennel seed are given there are culinery as well as medicinal uses of Fennel Seed Uses : benefits of Fennel seed: It is carminative and mild stimulant. It is used in chewing alone as a maticatory. It improves digestion in babies, it is used in colic to relieve gas. Fennel Tea is very helpful in curing colic. Fennel Seed is used in bad breath, skin disorders, nausea, diarrhoea, and amoebiasis