Chronic sinusitis in the international mainly divided into two types: one is not accompanied by nasal polyps type, the other is accompanied by nasal polyps type, so nasal polyps belong to chronic sinusitis. Acute sinusitis is also possible to turn into nasal polyps, mainly due to the following reasons: 1, acute sinusitis due to repeated episodes of nasal cavity, sinus repeated inflammatory lesions, long-term inflammatory stimulation can easily lead to nasal sinus complex, including the middle turbinate and other parts of the polypoid changes. If there is no timely treatment, it will become nasal polyps over time. Once become nasal polyps, with drugs is difficult to make it disappear, most need to be surgical treatment. 2, if the sinusitis patients at the same time accompanied by allergic rhinitis, easy to appear nasal mucosal edema. If long-term mucosal edema is not treated in time, it will lead to edema into nasal polyps, which is also a very common reason for the formation of nasal polyps. So in life, once suffering from sinusitis, whether acute, chronic, or with or without polyp formation, should be as early as possible to the regular hospital otorhinolaryngology consultation, so as not to delay the condition.