The pus of sinusitis is a purulent nasal discharge due to sinusitis. The time of discharge is analyzed according to the severity and nature of the lesion, which usually takes 7 to 10 days in acute sinusitis and may take longer in chronic sinusitis. It is related to the severity of the disease, the patient’s physical condition and treatment. 1. Acute sinusitis: acute sinusitis is more acute, purulent secretions will ooze out in a short period of time, but after timely anti-infective treatment, the condition can be recovered, purulent secretions discharge time required is relatively short, usually 7-10 days can be completely discharged. 2. Chronic sinusitis: Although the symptoms of chronic sinusitis are not as serious as acute sinusitis, it is easier to recur, and the time needed for healing is also longer, so the time needed for purulent secretions to be discharged is also longer, usually up to dozens of days, and some patients need to be operated on, and the recovery time after the operation can be experienced for half a year or more. Sinusitis patients with discomfort, can actively seek medical attention, clear diagnosis, follow the doctor’s instructions standardized medication and treatment.