A huge pimple inevitably appears after my period ends..

They say that acne usually appears before one's period.

I always get a few huge pimples right around the time my period ends.

Painful acne that cannot be squeezed from the outside and festers inside..

It doesn't come out even if I squeeze it, and it doesn't come out even if I poke it.

Then it turns into a scar, and just when it starts to fade a little, it's my period week again...

It feels like a vicious cycle...

What kind of product should I apply to get better with this kind of acne?