There is a possibility of self-healing for yellow runny nose caused by cold, but for those who have been recovering for a long time and have been running yellow nose for more than 10 days without improvement, it is recommended to identify the cause and treat it with medicine. After the human body is infected by bacteria, a large number of neutrophils will be disintegrated and necrotic after engulfing the bacteria and mixed with nasal mucus, so the nasal mucus is yellow. If yellow nasal mucus is caused by cold and flu, it can be cured by itself, but it lasts for a long time. The yellow nasal mucus caused by chronic rhinitis and sinusitis cannot be cured by itself, and it is necessary to actively treat the original disease, and at the same time, antibiotics can be applied to reduce inflammation, vasoconstrictors can be used to shrink the swollen mucous membrane of nasal cavity, and hypertonic saline can be used to wash the nose, and surgery should be considered when the symptoms are heavy. People with yellow runny nose should pay attention to rest, exercise in moderation, keep the indoor air fresh, treat rhinitis in time if it exists, and pay attention to prevent cold and keep warm.