What does it mean when nasal discharge changes from clear to yellow, and what should I do?

Generally, the change of nasal discharge from clear to yellow may be caused by environmental irritation, nasal dryness, recovery phase of a cold, acute sinusitis, bacterial rhinitis, and other reasons. Depending on the specific situation, improvements can be achieved through general care, medication, or surgical treatment. A detailed analysis is as follows:

1. Environmental Irritation

Long-term exposure to pollutants such as dust and cooking fumes can irritate the nasal mucosa, increasing secretion. Accumulated pollutants cause the nasal discharge to turn yellow. Avoid polluted environments, wear a mask when going outdoors, and rinse the nasal cavity with saline solution after returning home to remove residual contaminants.

2. Nasal Dryness

Dry air can damage the nasal mucosa, causing small amounts of blood to mix with secretions and oxidize, turning them yellow, often accompanied by a burning sensation in the nose. Use a humidifier indoors, moisten the nasal passages daily with warm water, and avoid forceful nose-blowing to prevent further mucosal injury.

3. Recovery Phase of a Cold

During the early stage of a cold, clear nasal discharge is common. In the later stages, the immune system clears the virus, and an accumulation of white blood cells causes the mucus to turn yellow. Drink plenty of warm water, ensure adequate rest, and under medical guidance, take medications such as Lianhua Qingwen Capsules, Ganmao Ling Granules, or Vitamin C tablets to promote recovery.

4. Acute Sinusitis

Bacterial infection causes inflammation in the sinuses, leading to congestion and swelling of the sinus mucosa, resulting in purulent secretions that make nasal discharge yellow. Follow medical advice to take medications such as Cefaclor sustained-release tablets, Eucalyptus and Pinene enteric soft capsules, and Budesonide nasal spray. Nasal irrigation may also be used to facilitate drainage.

5. Bacterial Rhinitis

Bacterial invasion of the nasal mucosa leads to infection, with inflammatory stimulation causing thick, yellowish nasal discharge, often accompanied by nasal congestion and headache. Under medical supervision, medications such as Amoxicillin capsules, Metronidazole tablets, and physiological seawater nasal sprays may be used. In severe cases, nasal irrigation procedures may be required.

Maintain daily nasal hygiene and develop proper nose-blowing habits—avoid blowing both nostrils forcefully at the same time. Eat a light diet rich in fruits and vegetables to boost immunity. If yellow nasal discharge persists for more than one week and is accompanied by fever or worsening headache, seek medical attention promptly to determine the underlying cause.