Should i wear a tampon before period starts?

Vaginal tampon use: Yes, you could in case you do not want to be surprised by your period, however you do need to change it at least 2-3 times a day, and you probably shouldn't use it for too long or make a habit out of it. A foreign body left in the vagina can change the vaginal flora and create complications - least problematic is an infection or odor and the worst one being toxic shock syndrome.