Why is the mucus so yellow?
Recently, with the seasonal changes and the peak period of influenza, the number of searches for "yellow nasal discharge" has increased significantly. Many netizens expressed confusion about this phenomenon and worried whether it was a sign of a serious disease. This article will combine hot topics and medical information on the Internet in the past 10 days to provide you with a detailed analysis of the causes of yellow nasal discharge, how to deal with it, and when you need to seek medical treatment.
1. Common causes of yellow nasal discharge

According to popular science content from medical experts and health accounts, yellow nasal discharge is usually related to the following reasons:
| Reason | Description | accompanying symptoms |
|---|---|---|
| viral cold | Initially, the discharge is clear, but later it may turn yellow due to immune reaction. | Cough, low-grade fever, fatigue |
| bacterial sinusitis | Bacterial infection causing purulent discharge | Headache, facial tenderness, fever |
| allergic reaction | Long-term allergies may lead to secondary infections | Sneezing, itchy eyes, stuffy nose |
| Dry environment | Drying causes mucus to concentrate and change color | Nasal dryness, pain, and bloodshot eyes |
2. Hot topics on the Internet
By analyzing social platform data (such as Weibo, Zhihu, and Xiaohongshu), discussions about yellow nasal discharge in the past 10 days have mainly focused on the following aspects:
| Platform | hot topics | Amount of discussions (articles) |
|---|---|---|
| #Is yellow nasal discharge a bacterial infection?# | 123,000 | |
| little red book | "Experience in caring for baby with yellow nose" | 87,000 |
| Zhihu | “Do I need antibiotics if my yellow nasal discharge persists for two weeks?” | 5600+answers |
3. When do you need medical treatment?
According to the advice of otolaryngologists in tertiary hospitals, you should seek medical treatment promptly when the following situations occur:
| red flag | Diseases that may indicate |
|---|---|
| Yellow nasal discharge that lasts for more than 10 days | chronic sinusitis |
| Accompanied by high fever above 39℃ | acute bacterial infection |
| Bloody or smelly nose | Fungal sinusitis (rare) |
| Vision changes/eyeball swelling and pain | Intraorbital complications (emergency) |
4. Home care suggestions
For ordinary yellow nasal discharge, you can try the following methods to relieve it:
1.saline rinse: Rinse nasal cavity 2-3 times a day to dilute secretions
2.humidify air: Keep indoor humidity 40%-60%
3.Apply hot compress to nose: Apply a warm towel to the bridge of the nose, 3 times a day
4.hydration: Drink 1.5-2 liters of water daily
5. Special reminder from experts
The health tips recently issued by the Beijing Institute of Respiratory Diseases state:Do not use antibiotics on your own. About 70% of sinusitis is actually caused by viruses, and the misuse of antibiotics may lead to drug resistance. It is recommended to observe for 3-5 days first, and then seek medical examination if symptoms worsen.
From the above analysis, it can be seen that yellow nasal discharge is in most cases a normal defense reaction of the body, but it needs to be judged comprehensively in conjunction with other symptoms. Maintaining scientific knowledge and avoiding excessive anxiety is the correct way to deal with it.
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