Depends , period changes a girls weight which makes them very upset & mood. Also you might get more pimples , somtimes u stress more if ur period comes late , you stress even more and feel uncomfortable when your period comes , they give u mean ass tummy pains and somtimes ur pussy hole feels like its throbing . Not to mention wearing a pad-like-diaper just incase it leaks and ppl see and laugh , also would u like somthing stuck up you while you walk around ? Cant run or jump , and whats worse that u can somtimes get it unexpectedly .