i have a small bump underneath the skin on the shaft of my penis. i am worried about it. i had never had anything like this before. at first i thought it was a pimple but i had never had a pimple on my penis. i tried to pop it but it hurt to much and then it kinda scabbed over. it has healed now and underneath the spot where i tried to pop it is white (only when the bump is under it, the bump is not secured to the skin, the skin moves over it) it hurt more at first but now only hurts when its touched or confined (doesnt happen to often). i have never had sex before so i dont know how it could be a std but i am still worried. could it be cancerous? after i took a better look at it i thought it was a ingrown hair or a infected hair folicole or something but now that it is healed it no longer looks like it could be that. i am very worried and i would like to know if i should see a doctor. any advice?