Is the bump on my penis syphilis?

[Larrybanger]

I had an encounter with a prostitute on 17 jan. She gave me unprotected oral sex and we had about 5 minutes of protected sex. I did not notice any sores present on her as it was a well lit apartment.
On about the 27th of jan I found a small bump on my lower penis quite near the scrotum. It was fairly hard. I squeezed it in the shower as I have often has fordyce spots etc. Nothing happened. It wasn’t sore, I noticed the next day it had sort of lengthened into a lengthy bump with a hard circular bit on one end. After a few days a noticed it quite reddish. I had put on some cortisone cream to try and reduce the swelling. It was quite swollen, in the shower I managed to get some pus and blood out of it. It teen felt much smaller. This has gone one for about 2.5 weeks. In the last 5 days though it has reduced dramatically and it now only a small bump on one side where the original bump was. It should be gone in about 2 days at this rate.
Any idea what this is? Is it syphilis?

[Life360_Dave]

Hi getting syphilis from oral is very low risk and if she did not have any lip sores it would be considered zero risk as is passed from rubbing contact against an acitive syphilis chancre and what your describing really doesnot match symptoms. But only testing would confirm this.

[Larrybanger]

Thanks for the reply. The bump has never been open or weeping, just looks sort of roundish mark on the main bump. The pus etc has only come out of the lump further along. Really strange. I have often has sebaceous cysts etc on my scrotum etc and recently started a new rugby training course after years and noticed the bump the next day. Could it be related? If so why would it take 3 weeks to healump.