Sinusitis can be detected using a proctoscope, which allows you to look at the specifics of your anal sinuses under direct vision. Sinusitis usually occurs when the anal sinuses are infected by pathogens, such as bacteria, and become locally inflamed. Through the proctoscope, the sinuses can be observed to be congested, red, swollen, or oozing, often becoming deeper and larger, and may have a purulent discharge attached. Anal sinusitis can cause anal pain or a sensation of swelling, and some people may experience pus and blood in the stool. Suffering from sinusitis needs to be treated early, and can be treated with medication under the guidance of a doctor, such as oral cefixime, metronidazole and other medications, along with gentamycin ointment or Ma Yinglong hemorrhoidal ointment and other treatments. If the effect of drug treatment is not satisfactory, or even further aggravation occurs. It is recommended that timely surgical treatment be carried out to incise the infected anal sinus and promote the early recovery of anal sinusitis.