Looks like some type of ingrown hair bump. You can try a drawing salve on it and cover it with a bandage. Keep it as clean as possible and covered to reduce friction against it until it heals. I do not think it is anything serious. The drawing salve you can purchase from a pharmacy. If it is still not getting better, try to find a physician that can look at it; not necessary to go to a hospital for this at this point.
The best.
First, do not worry. As KingSlayer said it is just an ingrown hair or a pimple.
It will pass on its own within a few days, practice good hygiene and do not wear tight underwear.
Didn't see any black spot on the picture just a pimple.
As to the rest if it will still bother you in 2-3 days visit an urologist and he will tell you what to do with it.
Best wishes, John.
P.s. use of any anti pimple cream may also prove to be useful.