Rhinits can cause the discharge of yellow nasal mucus. Rhinits is due to the symptoms in the nasal cavity and overall body caused by bacterial or viral infections when the body's immunity and resistance are low. The patient may experience sudden high fever, with body temperatures above 38.5 degrees Celsius, bilateral nasal congestion that alternates, and yellow purulent discharge from the nasal passages. Upon examination, significant congestion of the bilateral inferior turbinates can be detected, and yellow purulent discharge adhering inside the nasal cavity can be found. In terms of treatment, patients first need to undergo a routine blood test. If there is an increase in white blood cells, bacterial infection should be considered, and oral antibiotics should be administered. If there is an increase in lymphocytes, a viral infection should be considered, and antiviral medications should be taken orally. Additionally, patients should adhere to a light diet, abstain from smoking and alcohol, avoid spicy and irritating foods, drink plenty of water, and rest well for gradual recovery. (The use of medications should be under the guidance of a doctor.)