A cold is caused by the invasion of various pathogens such as viruses, bacteria, mycoplasma, and chlamydia into our upper respiratory tract, leading to inflammation there. Due to the inflammation in the upper respiratory tract, a large amount of secretions such as nasal discharge and phlegm in the throat are produced, causing symptoms like coughing. Some patients may have a dry cough, while others might cough up phlegm, which can be white or yellow. Coughing during a cold is a common symptom, and it can generally be addressed by taking some cold medicines, which are available as both traditional Chinese and Western medicines. Choosing the right medicine that suits one's needs can help treat the symptoms of a cold cough. (The use of medicines should be carried out under the guidance of a professional doctor.)