Please look at the date of the questions you are answering. This is almost 1 year old and that person is not on here looking for answers anymore.
See a doctor if really worried. It'll stop your anxiety & "cure."
If the bump is flesh colored and over a vein, it can be just a varicose vein (especially if you have varicose veins on other places on your body). Age is not a factor, from teens to older adults can get varicose veins on the penis or scrotum (and other places).
These type of varicose veins can range in size with most the size of a BB or smaller (or bigger). Inspect it closely. If it seems to follow or be "on top" of a vein, this is probably what you have. There is usually little to no pain associated with these type of varicose veins (scrotum varicose veins can cause pain).
No real medical treatment for it and not harmful to you or your partners.
See a doctor, though. You'll feel better and get better, regardless.
Take care.
Do not pop it, and go see a doctor. It might be an infected gland, but you need to see your doctor.
Aj