Swollen/sore/red Montgomery Gland

I've been exclusively pumping for the last 6 months, and for the last couple days one of the Montgomery glands on my right aerola has been red. I thought maybe it was just plugged so I squeezed a bit to see if any milk would come out (some of my glands leak milk) and it really hurts. Its not too uncomfortable while I pump, but the soreness isn't going away. I'm afraid it might be/get infected. Anyone know how I should treat this?