The cause of yellow nose in infants varies and the time to heal itself varies, and individual infants cannot heal themselves. And the autoimmunity of each baby is very different, which will also lead to the difference in the length of time for self-healing. If the yellow nose is caused by viral cold, it usually takes about 1 week to heal, so the symptoms of yellow nose can basically disappear in about 1 week. However, if the yellow nose is caused by rhinitis and sinusitis, it is difficult to heal by itself and needs to be actively treated with medication. Some babies with fire in their body will also cause yellow nose, which can be cured in 3-5 days after taking medicines to reduce fire. If the immunity of infants is relatively high, no matter what the cause of yellow nose is, the speed of healing will be relatively fast, and it can even heal itself without taking medicine. However, if the immunity is poor, you need to take the right medicine under the guidance of the doctor.