Std question

So my ex husband had genital warts and didn’t tell me he had them and we got married. I knew there was something on him but he said he didn’t know what it was! So I believed him. Turns out it was genital warts, and he knew the entire time. Anyways we are divorced. Now I’ve never gotten warts myself. However my ex and I had unprotected sex many many times.

My current fiancé has had this mysterious bump show up on the base of his penis. He told me it’s an ingrown hair and that it hurts. However it looks nothing like the ingrown hairs I’ve seen in my life. Well mainly I’m worried about what it is! I finally looked at it yesterday and it looks like something grew over something. He started squeezing it and it started bleeding, he told me pus came out before. I’m not sure what’s going on. It’s been there for at least 2-3 weeks now. I’m very concerned at this point, and I know he is too!