Cysts in the right maxillary sinus are mainly formed when the right maxillary sinus is affected by acute rhinitis and allergic rhinitis for a long time, resulting in blockage of the mucosal glands of the right sinus and submucosal fluid accumulation. The right maxillary sinus cyst grows slowly, and the cyst can rupture naturally when it develops to a certain extent, and the cystic fluid flows out through the sinus opening, which is usually yellow. Therefore the main symptom of a right maxillary sinus cyst is a yellow watery fluid dripping out of the right nostril when the patient is unaware of it all of a sudden. In addition, the following symptoms may occur: 1. Nasal symptoms: some patients may have nasal congestion, runny nose, and decreased sense of smell; 2. Facial symptoms: slight pain and pressure in the right frontal area, orbit, cheek or nose, facial swelling, protruding cheeks, and if the mass is too large causing destruction of bony structures, the damaged bony structures can be palpated during palpation; 3. Ocular symptoms: when the cyst compresses the orbit, resulting in cranial nerve symptoms: when the cyst presses on the orbit, it may cause protrusion of the right eye, diplopia, etc.; 4. If the cyst is small and has no obvious clinical symptoms, no special treatment can be done and regular hospital checkups can be done. However, if the cyst is large and the symptoms mentioned above are obvious, medication or surgery is recommended under the guidance of a medical professional.