Hello, Doctor. So about 3 weeks ago, I got what appeared to be red pimples on the foreskin on my penis. A week later, they had developed to look a bit more like craters, so I showed them to my father (an endocrinologist and emergency pediatrician.) According to him, I had acquired chancres on my penis. To treat it, he prescribed 8 azithromycin and told me they would clear up in a few weeks. It's been 2 weeks since I've taken the medication, and for some reason they not only haven't gone away, I fear they've developed even worse; there's a sort of white ring around them, and they're somewhat painful on occasions (i.e.: when I lay on them.) But they're hard, almost like a scab. I fear that I might have chancroids instead, and I've included pictures of both of them (they both have essentially the same symptoms.) Please advise.

 

P.S.: I am a Man who has Sex with Men. Could it be possible that azithromycin therapy has failed?