The reason for anal pain after sitting for a long time is as follows: 1, it is possible to have more serious external hemorrhoids, because external hemorrhoids arise directly below the dentate line, this location is an important control area belonging to the human nervous system, where the sensory nerves are very sensitive, and people sit for a long time, it will also therefore affect the blood flow of the anal canal artery, thus causing the production of hemorrhoids,. 2, because the sitting time is too long, the blood flow is not smooth. The actual fact is that the actual person is not a person of the people, but a person of the people is a person of the people. To sum up, the pain in the anus is due to hemorrhoids, or the blood is not circulating in the anus.