The general function of Sophora flavescens is to clear away heat and dry dampness, dispel wind and relieve itching, kill insects and diuresis. Dampness and heat are generally caused by eating greasy food and drinking too much. Dampness and heat can cause abdominal distension, nausea and vomiting. Clearing heat and eliminating dampness is a common treatment for damp-heat diseases, which can be decocted with Sophora flavescens alone. Skin itching and leprosy are considered by Chinese medicine to be caused by wind evil. Sophora flavescens has the effect of expelling wind and relieving itching, and itching of lower limbs is generally related to damp heat, so it can be bathed with this product. Traditional Chinese medicine believes that the lung governs the qi of the whole body. Damp-heat will lead to the obstruction of qi in the whole body, with the highest lung position and unobstructed below. Damp-heat accumulation can lead to unfavorable urination. Sophora flavescens has obvious heat-clearing and diuretic effects. Modern pharmacological research believes that this product has obvious inhibitory effect on the heart, which can slow down the heart rate and improve arrhythmia.