Chrysanthemum is cold in nature, and the cough may occur because the medicine is not right, or the yang qi is damaged after taking it. Chrysanthemum can be used for hot cough, if other causes of cough, then drink chrysanthemum water has no therapeutic effect, so instead of cough. Chrysanthemum is sweet, bitter and slightly cold in nature. It belongs to lung and liver meridian. It can dissipate wind and clear heat, calm the liver and improve eyesight, clear heat and detoxify (remove heat and toxicity from the body). It is used for wind-heat and cold, headache and dizziness, redness and swelling of the eyes, dimming of the eyes, sores and canker sores. Drinking chrysanthemum water can relieve coughs caused by wind-heat, wind-dryness and liver-fire, but for coughs caused by wind-cold and phlegm-dampness, drinking chrysanthemum water not only fails to relieve coughs, but may also aggravate the condition. In addition, because chrysanthemum is a cold product, after taking it, it may damage the yang qi, leading to a decrease in the warming function, which can also occur in coughing. Therefore, it is recommended that patients use medication under the guidance of a doctor, do not take medication on their own to avoid adverse reactions or aggravation of the condition.