this is a weird question lol, does anyone else get bumps on their armpits?! it hurts lol.

Razor burn

Try using shaving cream next time you shave

are they on the surface or underneath and about the size of a fingertip or so? if so, could be your lymph nodes working to fight something

its not razor burn, it's under my skin.

If it's under your skin tell your doctor, they need to drain it. I've had 2 already they will give you antibiotics also