Polygonum aviculare is diuretic and diaphoretic (improves the problem of dribbling in urine, small amount of urine not passable), insecticidal and antipruritic. It is used in treating hot drenching (burning and stinging pain during urination, accompanied by frequent urination and urgency, and discomfort of traction in the abdomen) and astringent pain, short and red urine (small amount of urine with dark yellow color), abdominal pain caused by worms, eczema of the skin, and itchy vagina and subcutaneous discharge. Polygonum aviculare is slightly cold, clearing heat, sinking and descending, mainly into the bladder meridian, long in clearing the bladder, seepage and diarrhea of dampness and heat, and diuretic function of gonorrhea. It can be used for damp-heat downward injection of bladder gonorrhea, especially suitable for heat gonorrhea. Often used with cypress, licorice, chaihu. Polygonum aviculare is bitter and cold, can remove dampness and heat to kill insects, for damp-heat sores and ulcers, immersion pain and itching, redness, swelling and overflowing and other evidence, especially specialized treatment. It can be used for eczema, wet sores, itchy vagina, can be used alone in decoction and external wash, can also be combined with the ground skin seeds, snakeskin seeds, thorns and other decoction and external wash. If you need to use Polygonum aviculare, it is recommended to do so under the guidance of a doctor.