Is brushing your teeth supposed to...burn?

I'm not sure if I'm just a wuss or if I've been allergic to toothpaste my whole life and only now noticed...but does brushing your teeth...burn?

Whenever I brush, my whole mouth feels like it's on fire. Like its so sensative the toothbrush feels like needles, it itches too..but like, so much it hurts. Mouth itches a few minutes after too

Is that just the spearmint? Do other people experience this? Or is it something else?