If you’re feeling PMS symptoms or think your period might be about to start, you can wear a light underwear liner, pad or period underwear for “just-in-case” protection. It’s not a good idea to put a tampon in if you don’t have your period because that can cause an infection. If you’re not bleeding, or even if your flow is very light, then inserting and removing a tampon can also be uncomfortable. It’s better to use a liner, pad, or period underwear instead.