I know this sounds embarrassing..

Hello doctors,
im 15 years old and have been searching the web for someone to help me with this problem. I have some kind of wierd pimple on the lower part of my penis and i try to pop it but it keeps coming back. This isnt the type of my pimple you would find on your face or back.

[loiloi]

You're right - a pimple on your penis is unlikely to be acne vulgaris, which commonly occurs on the face and back. For this reason you should post this question in the Dermatology forum instead of the Acne Forum.
This may be total harmless, especially if you are not yet sexually active, but if it doesn't clear up you should see your doctor. You must stop popping it though. Popping it will spread bacteria under skin, delay healing time and may lead to secondary infection.
Eloise.