The way to treat nosebleeds with Imperata Cylindrica Root is to soak in water for 20-30 minutes, boil it over high heat, turn down the heat and decoct it for 15 minutes. Cylindrospermum parkii root is the dried rhizome of Cylindrospermum parkii, family Gramineae. It is sweet in flavor and cold in nature. It belongs to the lung, stomach and bladder meridians. It has the effects of cooling blood to stop bleeding (making blood cool and moist, preventing bleeding), clearing heat and inducing diuresis. It is used in treating blood-heat, vomiting blood, epistaxis, blood in urine, fever and thirst, damp-heat jaundice, edema with scanty urination, and feverish drenching (burning and stinging pain during urination, accompanied by frequent urination and urgency, and discomfort of traction in the abdomen) with astringent pain. It is cold in nature, so it is forbidden to use it for those who are weak and cold in the spleen and stomach (spleen and stomach are weak and cold); it is also diuretic, so it is forbidden to use it for those who urinate a lot without thirst. If there is a need for medication, it should be used under the guidance of a doctor, and should not be used blindly on its own to avoid adverse effects.