I went to see the doctor yesterday for the monthly checkup of the cyst and he applied some silver nitrate like always. Yesterday evening when I was changing out the gauze pads the one he put in had the usual black gunk but that was it. This morning when changing out the gauze there was blood on it. I feel like the bleeding was because of the silver nitrate. Usually with the black gunk the gauze pad will be stained a reddish brown color.