Applying a warm compress to the face can help to loosen and drain mucus from the maxillary sinus. To apply a warm compress:
Drinking plenty of fluids can help to thin out mucus and promote drainage of the maxillary sinus. To stay hydrated: how to drain maxillary sinus at home
Reduce mucosal swelling to reopen the ostium and thin mucus so it can flow out naturally. Applying a warm compress to the face can
These require medical evaluation, possible imaging, antibiotics, or even sinus puncture for true drainage. how to drain maxillary sinus at home