4 DAYS AGO I HAD A SUDDEN ONSET OF DISCOMFORT WHEN PULLING MY FORESKIN BACK TO URINATE.I FELT A DULL PAIN OVER THE HEAD OF MY PENIS. AFTER EXAMINING THE HEAD OF MY PENIS I COULD NOT SEE ANYTHING WRONG WITH IT..SO I HAVE IGNORED IT..4 DAYS LATER I STILL FEEL THAT DISCOMFORT WHEN I PULL MY FORESKIN BACK..I NOW HAVE NOTICED A TINY RED BUMP ON THE TOP CENTER OF THE HEAD OF MY PENIS,,,IF I LOOK VERY CLOSELY IT SEEMS TO HAVE A SHINY WHITE CENTER...BUT THIS IS VERY TINY..I HAVE COME TO THE CONCLUSION THAT WHEN I PULL MY FORESKIN BACK IT PASSES OVER THIS BUMP CAUSING THE SLIGHT DISCOMFORT (NOT VERY PAINFUL DOES NOT BOTHER ME..ONLY WHEN I PULL THE FORESKIN BACK OR I RUB MY FINGER ACROSS IT.) I DO HAVE PEARLY PAPULES AT THE CIRCUMFERENCE OF MY PENIS..HAVE HAD FOR YEARS WITH NO BOTHER.. BUT THIS IS A SINGLE BUMP RIGHT ON TOP CENTER OF MY PENIS HEAD..I DID NOT HAVE SEX THE DAY PRIOR TO FEELING THE DISCOMFORT.. I DID MASTURBATE... AND I KNOW IT IS NOT A STD...PLEASE HELP WHAT COULD IT BE? WHAT SHOULD I DO? COULD IT BE A SIGN OF PENILE CANCER? AGAIN I ONLY FEEL THE DISCOMFORT WHEN I RUB MY FINGER ACROSS IT OR MY FORESKIN RUBS ACROSS IT..VERY TINY YOU CAN BARELY SEE IT..