The anus is itchy as if there are bugs moving, consider the following: 1, the anus has pinworms, this parasite is difficult to see with the naked eye, and it is at night, especially after 12 o’clock in the evening, due to the human body anal sphincter relaxation, pinworms will be from the anus inside to climb out to spawn, so there will be a feeling of worms in the crawling, especially in the night time, itching feeling is more pronounced, you need to use the pinworm clear deworming. The first thing you need to do is to get rid of the pinworms. 2, caused by anal eczema, there will be more obvious itching, once scratching may appear local ulceration, oozing blood or oozing and so on. 3, caused by the warts, mainly manifested as a crown-shaped protrusion, there will be pain and obvious itching. 4, may also be caused by anal fissure and so on, it’s best to go to the hospital in a timely manner to be treated.