Left maxillary sinus mucosal thickening, this is to take sinus film or sinus ct magnetic resonance, a kind of imaging description, rather than a specific disease, the specific cause should be combined with the patient’s age and symptoms to determine. The most common cause is the local inflammatory thickening of the mucosa caused by chronic maxillary sinusitis, if accompanied by a runny nose, headache, you can take anti-inflammatory drugs to relieve pain. If you don’t have any symptoms, you can have regular checkups. Usually pay attention to avoid colds, when the weather is cold, you can go out with a mask.