1. Heat-clearing and detoxicating: Black tea has the effect of clearing away heat and detoxicating, which can remove moisture and toxins from feet and relieve fatigue and discomfort of feet.

2. Improve blood circulation: Soaking feet can promote blood circulation of feet, while caffeine and tea polyphenols in black tea can strengthen the contraction and expansion of blood vessels and help improve blood circulation of feet.

3. Relieve pain: Soaking feet can relax muscles and nerves and relieve foot pain, while the ingredients in black tea have analgesic effect and can relieve pain.

4. Dehumidification: Black tea is a beneficial dehumidifying tea. When you soak your feet, you can use the volatile components of black tea to help discharge excess water from your body and reduce the damp and hot feeling on your feet.

5. Beauty care: Many nutrients in black tea are good for the skin. Soaking feet can improve the color of feet, make the skin of feet more tender and smooth, and also help to promote health.