1, can be used as an adjuvant treatment for patients with severe internal heat, especially those with toothache, bitter taste, halitosis and oral ulcer caused by stomach fire. Soaking coptis root in water can clear away fire and detoxify, clear away heat and relieve annoyance.

2, Huanglian soaking in water can improve the situation of endless urination. For patients with damp-heat and cholecystitis in urine, Huanglian soaking in water can clear away damp-heat, clear heat and gallbladder.

3, Huanglian soaked in water to improve menopause, irritability, insomnia and dreams, can improve sleep symptoms.

4. If you take Huanglian in water in summer, you can prevent getting angry and heatstroke.