If the ambient temperature is too high during coughing, you can blow a fan to help lower the ambient temperature, so that you do not sweat more, as the body loses more water when you sweat more. If the water loss is high, the phlegm will be thicker and less easy to cough up, which is also very unfavorable to the recovery of cough. However, if the surrounding environment is not particularly hot, it is not recommended to blow a fan, as it is easy to catch a cold. It is very easy to catch a cold, which can aggravate the cough and may cause serious pneumonia, which is dangerous. If the temperature is high, you can blow the fan properly, and when you sweat a lot, you must wait for the sweat to dry before you can blow the fan, not directly blowing the fan, otherwise it is very easy to get cold.