<human>: Can you give me the gist of the text in a nutshell?

So i've had this thing what i think is pilonidal for about a year now, but i'm not sure if it's true. There was small hole at the top of my buttcrack when i noticed it, but it didn't drain, there was no lump, no pain, no swelling or anything that is used to describe pilonidal. Also, today I noticed that it has closed. Not sure how much though, because it's hard to see through a mirror, but its maximum 0.1 mm in diameter now. Right now i'm in school for a last year so i don't want to get surgery or something like that, because it would cause me to miss a lot of things in school and before summer i'll have exams on which depends my whole future.
<bot>: should i worry if my "hole in a buttcrack" is max 0.1mm in diameter, it has no lumps, no pain, no swelling or discharge.