STD or infected ingrown hair

I'm sexually active but not as much. i also shave my pubic hair often. Last week in the shower I noticed a

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grayish bump on my testicles and figured it just came from shaving because I get them almost every time. Last time I had sex was September 10 unprotected. That’s also the same day I shaved (like 2 hours before). I was in the shower this past Saturday and for some reason when I was washing I was scrubbing hard (probably because I was sweating earlier in the day during yard work) so when I got out the shower I dry off and just happened to check the bump, I noticed that it had actually busted, it was red at the time due to the blood i guess. So I’m trying to figure out exactly what it is. It’s not hard, firm or raised, doesn’t hurt, itch or anything like that. Could it be a disease or an infected ingrown hair? It has hair coming out of it and all the sore diseases I’ve seen on the internet, they all have no hair around the sore. Can someone help me out

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thats an ingrown hair buddy as u can see an hair has been bent into the skin your good bro