Do I need to wear a pad with period underwear?

No, you don't need to wear a pad with period underwear because period underwear is literally designed to absorb your flow all by itself. That's why it's so cool.

Period underwear has these super special layers built into the crotch part that soak up your period blood and keep it from leaking through. So it works just like a pad, but it's part of your underwear. You just wear it, and it does its job.

Some people, especially on really heavy flow days, might use period underwear as a backup for a tampon or menstrual cup. But on its own, it should be enough, and you definitely don't need a pad with it. You just have to figure out what feels best and works for your body and your period flow.