When the amount of phlegm is relatively large, the common methods are as follows: 1, appropriate hydration, drink more water, you can also use expectorant drugs. Diet should be light and avoid intake of spicy and stimulating strong food. 2.Take expectorant medicine with better effect and low side effect, commonly used expectorant medicine are bromelain hydrochloride, ambroxol such. 3.Nebulization can effectively moisten airway, dilute phlegm and promote phlegm discharge. 4.Humidify the air to avoid too dry air, you can humidify by humidifier, keep suitable temperature and humidity in the room, let patients rest in a bathroom full of water vapor bathroom for 5 minutes, which can also effectively promote sputum dilution.