Most people have a cough after a cold because of the inflammation in the body caused by the cold, and this inflammation is not eliminated after the cold, which can lead to coughing symptoms. Most people who have a cold have a cough with phlegm, runny nose and nasal congestion. Most patients have a dry cough or a small amount of phlegm, and this symptom lasts for about 3-8 weeks. If the cough is intense during the coughing period, patients need to go to the hospital for examination to avoid pneumonia due to prolonged coughing. If the cough is mild, you need to drink more water, keep warm and keep the indoor environment ventilated and humid to help relieve coughing symptoms, and remember to wear a mask when you go out.