I Was In The Dermatologist For A Body Mole Check

I was in the dermatologist for a body mole check in October and had a cyst looked at too. It was the size of a dime and the doctor wasn't concerned because it wasn't bothering me, it was hard. Now at work I irritated it by bumping it repeatedly and now it is really swollen, red with yellowish dot where the cyst was and it really hurts.