Might possible pinworms. They can make your anus very itchy. Try putting a piece of clear tape on your anus to see if you can see a worm after you pull it off. (I don't think I was being very clear. Let me try again. At some point when you feel very itchy take a piece of clear tape and touch it to you anus area and then look at the tape to see if you picked up a worm.) Or you can just go to the doctor and get yourself checked. Good luck.
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