The presence of sinusitis may cause ear pain, which is often caused by acute otitis media, and the inflammatory condition of the sinuses may further affect the nasopharynx. This can lead to acute inflammation of the middle ear, acute congestion and swelling of the eardrum, and even further purulent infection in the middle ear cavity, causing severe ear pain and even perforation of the eardrum and pus in the ear. Therefore, for patients with sinusitis, it is important to actively carry out anti-infection treatment to reduce the chances of further acute inflammation of the middle ear, and if the symptoms of ear pain are more pronounced, further detailed examination of the condition of the ear is required.