Cold cough is mainly caused by the attack of wind and cold. It is most commonly caused by cold or eating colder foods, and is also easily caused by internal cold or Yang deficiency. It causes coldness, fear of cold, runny nose, sneezing, white foamy sputum, and a thin white tongue coating. Treatment is based on warming the lung and dispersing cold, which can be treated with Xiaoqinglong Tang, Sanjiao Tang, and Tongxuan Liyu Wan. Hot cough is mainly caused by wind-heat, and can also occur when eating spicy, irritating and fire-prone foods, and can be accompanied by swollen and sore throat, fever, and thin yellow tongue coating.