Why does it hurt when you have a tampon in?

Well, it could mean alot of things. You could have a problem, Your body doest like it maybe.. idk there could mea manydiffrnt thin no on really nos im 11 and i tred a tampon. Yes ik 11. My nana acualy thought me. i wet threw abput 12 lol. But somhimes it feels ok ad smethimesit dest. I really don't truht sampons i onl trust padds s i onlky us pads but it depmends on the person... when i wear pads i feel safeer noing i probubly wont leak but ppl r diffrent