Fennel is an anise-flavored plant whose filamentous branching leaves are used as an herb and the seeds as a spice. The fennel plant can grow to above man's height. Fennel (Foeniculum vulgare) is a plant in the umbellifer family (Apiaceae).
The seeds have been known to be medicinal for centuries. They are administered in a variety of ways. The most powerful form is fennel oil, which is pressed from the seeds. Another way is to draw extracts (prepared as a tea) from the seeds.

In the Kashmiri Chai Latte, you taste a nice amount of fennel.

Fennel seeds can help with intestinal problems and menstrual disorders, among other things. It is also used to encourage breastfeeding, as the essential oil made from the seeds contains a large amount of anethole (a phytoestrogen). However, the Nutrition Center and the Joint Dutch Midwives advise against the use of fennel (tea) for breastfeeding women.

These are some of the health effects fennel seeds have such:

The ancient Greeks were already familiar with fennel seed. It is said to aid digestion. Moreover, by drinking or eating fennel seeds, you also have less intestinal gas and bloating again.
Do you have a fever? Then it may help to drink a cup of fennel tea. The dry fennel seeds have antipyretic and analgesic effects.

Originally from Asia and the Mediterranean, fennel was transported to the rest of Europe via medieval trade routes.