The fastest way to diuretic is to apply diuretics intravenously. Diuretics for therapeutic purposes are usually chosen for oral or intravenous application. In daily life, because caffeine can promote kidney function and increase urination, certain beverages containing caffeine also have a certain diuretic effect, especially black coffee has a better effect. Red cow, green tea and other beverages also contain caffeine, after drinking also has a certain diuretic effect. In addition, cucumber, red lentils, winter melon and other foods may also have a diuretic effect on swelling.