Lobelia leaf has the efficacy of lowering blood pressure, diuretic, lipid-lowering and anti-radiation, etc. It can be taken 5-10g at a time, brewed with boiling water as tea, for an unlimited time and times, every day. Roburia leaf is the leaf of the plant Roburia, originally named because it grows in the Roburia zone, also known as red hemp, red willow, etc.. According to Chinese medicine, rooibos is sweet, slightly bitter and cool in nature, and belongs to the liver, heart and kidney meridians, with the effects of strengthening the heart, inducing diuresis, clearing heat and calming the liver. It is mostly used clinically for headache, dizziness, palpitation, insomnia, edema, and dysuria caused by hyperactivity of liver yang. In recent years, studies have concluded that it also has some auxiliary antihypertensive effect on patients with hypertension. Because it is a traditional Chinese medicine with few side effects, it can be taken in water every day. However, it should be noted that rooibos is cold in nature and should not be taken by pregnant women as it may lead to miscarriage. In addition, people with physical weakness and cold spleen and stomach should not take it to avoid affecting their health and aggravating their condition.