After catching a cold, having a runny nose is a common symptom. In fact, the appearance of a runny nose is due to inflammation of the nasal mucosa caused by the cold virus, and the runny nose is a symptom caused by inflammatory exudation. It is a manifestation of inflammation, not detoxification, and has nothing to do with the body detoxifying. In addition to a runny nose, other common symptoms include sneezing, nasal congestion, throat discomfort, coughing, fever, headaches, etc. After catching a cold, it is important to rest, avoid exposure to the cold, drink plenty of water, and ensure that the room is well-ventilated to aid recovery from the cold.