(3-4mm) Single, raised, red, and had a very small whitehead
at the center. It feels hardened on the inside, and is slightly painful when applied pressure to it. Yesterday, I noticed the small whitehead had turned significantly bigger, then I believed it popped by itself because the whitehead was gone. When I squeezed it, i noticed a yellow-ish pus comes out. A day before the bump appears, i remembered the area developed was accompanied by rash, and was slightly painful.