Coughing with white phlegm after a cold is a wind-cold cough, indicating that it is caused by cold invading the lungs. You can take Chinese cough medicines, such as Tong Xuan Li Lung Pill, Compound Chuan Bei Jing Tablets or Chuan Bei Loquat Paste. You can also take Western cough medicine, such as cough suppressant with anti-inflammatory drugs (e.g. amoxicillin) and expectorant medicines (e.g. fresh bamboo leech). You can also treat your cough with dietary therapy, such as baking oranges, roasting them on the fire and turning them over and over until they are hot, which is very effective for wind-cold coughs. After coughing, you should eat a light diet. You should not eat spicy and irritating food, or sweet and sour food, which can easily produce phlegm. Drink more ice sugar Sydney water, and you can drink more chicken soup, which has a very good effect on relieving these symptoms caused by wind and cold.