If a six-month-old baby has a clear nose due to cold, it can heal itself; if it is due to allergies, medication is recommended. A child’s runny nose can be due to a cold or allergies, both of which can be runny. If the child sneezes and has a runny nose when he/she gets cold, it can be cured quickly by itself. If it is due to cold, the child’s general symptoms are not obvious, and a slight nasal congestion or runny nose can be cured by itself after a few days. If allergies are the cause of sneezing, runny nose and nasal congestion, medication is recommended. After treatment with nose spraying drugs or anti-allergy drugs, the symptoms of rhinitis can be effectively controlled, the runny nose can be reduced, the nasal congestion can be alleviated, and the affected children can sleep and eat well. Six-month-old babies with runny nose should pay attention to the ventilation of the place and keep the humidity in the room; drink more boiled water to promote the discharge of virus; the diet should be light, mainly based on breast milk or milk powder; you can add fruit puree or juice to the baby in appropriate amount to supplement vitamin C and improve the immunity of the body.