How do you deal w when someone says something that slightly bothers you at the time, but when u think ?

about it after the fact, it really starts to bother you. Sometimes when people say inconsiderate things you don't fully realize it until the situation has ped. Do you let it bother you? Sometimes it can be trivial, and even confronting the person later will make you seem like a whiner because they can be like, dude, just relax.