If the baby does not have a fever, but simply has a runny nose, this is probably an early symptom of a cold. It is recommended to observe or use sea salt water nasal wash to moisten and clean the nasal passages, warm towels to warm the bridge of the nose, and in severe cases, anti-allergy medication. The symptoms of a child’s cold can vary greatly from time to time, which is related to the infecting virus, as well as the body’s reaction to the infection and its own resistance to the disease. Cold and runny nose tend to get better after 3-5 days, but it can also last up to 1-2 weeks. If it is not good after 2 weeks and there is still runny nose, you should pay attention to whether it is allergic rhinitis. At present, we should observe the change of the child’s body temperature, if there is an increase in temperature, reaching 38.5℃, we should promptly use antipyretic drugs, such as ibuprofen granules or acetaminophen suspension, and calculate the dosage according to the body weight.