Recently, I have notice several tiny black spots (the size of a pin-head) on the end of my penis (near the opening). One of them is tough, sllightly raised and tender. I thought this was a blackhead and tried to pop it. It was tender, and then I thought it was a blackhead. I tried to excise the black part and accidentally pierced it, and then it bled red for 1 to 3 min. I am in my 3rd day of an anti-biotic for a recent diagnosis of chlamydia. Are the spots related to the chlamydia and will they go away. Hal