Cough with yellow sputum is mainly caused by hot cough, mostly caused by feeling the evil of wind-heat, besides causing cough with yellow sputum, there will be fever, fear of heat, sweating and sore throat. When you do the examination, there will be yellow moss, and the tongue will be red, and you need to treat it with drugs that clear wind-heat and promote lung-heat to stop coughing. It can be treated with Sangju Drink, or with medicines such as Acute Syrup, Fresh Bamboo Leak Oral Liquid, Snake Gallbladder and Chuanbei Liquid. When the wind-cold evil attacks the lungs, it will cause coldness, fear of cold, sneezing, runny nose, dry and itchy throat, and the sputum coughed up will be thin and white, and almost no yellow sputum, so it is considered to be caused by wind-heat colds. In terms of diet, you need to pay attention to drink more water, eat appropriate food that clears heat and removes fire, and you can eat fresh vegetables and fruits.