Microbilology / Pimple

I don't know why I'm struggling with only this one question out of the whole semester! It sounds so simple, I guess perhaps I am over thinking it.

Type of innate defense, and what is happening in the body during this defense.

I was thinking physical, because the skin is protecting it from the exterior, then I thought inflamation because a zit is swollen, then I thought are the t cells fighting th2 infection? Or is molecular...sigh

I know there are two defenses since an infection has occured