Different appearance, different functions.
1. Different shapes: fennel seeds are oblong in shape, with two pointed ends, and a small longitudinal tube in the middle. Cumin seeds are oval in shape, with both ends relatively pointed.
2. Different effects: Fennel seeds have the effects of dispersing cold and relieving pain, regulating qi and harmonizing the stomach. Cumin has the effects of warming the kidneys and liver, promoting qi and relieving pain, and harmonizing the stomach.