1. Could it be HPV?
2. Will more and more lumps pop up as days goes by? And will they become bigger? Or do all lumps appear simultaneously?
3. If I touched my penis with my hand and also accidentally touched my face, will those lumps (assuming they are warts) also appear on my face?
4. Should I get HPV vaccine now? Will it still be effective?
5. I have seen some posts on here and reddit where people say they keep getting genital warts even after treatment. Should I be concerned about that?

Really scared so hope I can get some clarifications

I scanned your previous thread. Since that was a no risk exposure for any and all STIs, it has no bearing on the issues on your mind now. And since you don't mention a new sexual experiences since then, I assume there haven't been any. Directly to your questions.

1. Most genital warts have several lesions in clusters; a single bump is unlikely to be a wart. And warts are not smooth, round and red. No STI causes this sort of thing. I'm sure it has nothing to do with the sexual exposure described in your previous thread. All I can advise is getting care in person, perhaps with a dermatologist -- or just sit tight for a couple of weeks and do nothing if it goes away. In the meantime, don't mess with it:  no squeezing, pricking with needle, etc. Such maneuvers usually have the main effect of making skin lesions non diagnosable even with expert evaluation.

2. Probably no others will show up. See a dermatologist if that happens.

3. Genital warts are not auto-inoculated (i.e. self spread) to new body locations. The HPV types that cause warts and other genital infections do not readily infect other parts of the body.

4. HPV vaccine recommendations are largely age dependent. If you are 26 or younger, everybody should be immunized. The vaccine isn't generally advised after 26; after that most people have already been infected with the 9 HPV types covered by the vaccine so there's no point. However, this is highly variable depending on your sexual lifestyle. If few sex partners in the past and you're likely to be sexually active with new partners, being vaccinated probably makes sense. Discuss with your doctor. The vaccine is 100% effective in preventing new infection with the nine types covered by the vaccine.

5. First, be wary of Reddit and other online sources run by and for people with or at risk of whatever health problem is on your mind. People can say anything; you'll be much better served by sticking with sites run by professional organizations or at least moderated by genuine experts (like this one). Most anxious persons tend to see things that just increases their fears. Beware of "Dr. Google!"

That said, this particular information is exactly right. HPV infections usually become inactive, no longer detectable by DNA testing and no longer causing warts or other problems. However, many or most infection persist in silent form, and reactivation occurs from time to time. It makes sense that some Reddit users have had recurrent warts after treatment. However, this is the exception, not the rule.

Another comment about your penile "bump":  STIs are uncommon causes of genital skin problems. I have a book title Genital Dermatology Atlas. It has 300 pages of photos of various genital skin problems. Intros 300 pages, all STIs are covered in 15 pages. 

I hope these comments are helpful. Let me know if anything isn't clear.

HHH, MD