What causes paraphimosis?
Uncircumcised men sometimes pull the foreskin back during sex, when they go to the bathroom or when they clean their penises. Doctors and nurses might pull the foreskin back when they examine the penis or put in a catheter.
Sometimes you, a doctor or a nurse might forget to pull the foreskin back down. If the foreskin is left behind the head of the penis too long, your penis might swell so much that the foreskin is trapped behind it.
Written by familydoctor.org editorial staff