Sinusitis itself refers to an inflammatory lesion of the sinus mucosa. If active and effective treatment measures are taken, sinusitis can generally be completely cured. It is not a serious disease.
However, if sinusitis is not well - controlled, it can also cause relatively serious complications.
Sinusitis can cause orbital cellulitis and optic neuritis in the eyes. It can also lead to secretory otitis media or suppurative otitis media in the ears. It can also affect the respiratory tract. For example, nasopharyngitis, laryngitis, tracheitis, tonsillitis, pneumonia, etc. may occur.

In severe cases of infection, it is very likely to cause tonsil or adenoid hypertrophy, resulting in snoring during sleep, which affects growth and intellectual development.
In addition, severe headaches or intracranial complications may also occur.
