Ive had a bump on the side of my shaft for over a year now. Last month I had a blood and pee std test and everything came back negative, though I do not believe those tests include hpv. It hasnt spread, but is on a cycle of growing (and then shrinking), and I pop it and a little pus comes out which shrinks it down but even after popping the bump doesnt feel empty.  What could this be? Thank you in advance for your help.
Howell come to ChatDoctorI really appreciate your concern, if the pus is coming out of this lesion then this could be infection some time this may need surgical intervention for to Chat Doctor.