Circumcision is the surgical removal of the skin covering the glans and is one of the oldest and most common surgical procedures in the world. Although there is evidence that the first circumcision was performed in Egypt in 4000 BC, according to some anthropologists, it dates back to the 10th millennium BC. The purpose of medical circumcision is to obtain enough foreskin to expose the glans penis and to prevent medical problems caused by the foreskin. Although it is known that the complications arising from these procedures are not well documented, the complication rates in the literature vary between 1 and 15%, when evaluated according to age, the rate of post-circumcision complications in newborns is reported to be approximately 0.2-0.6% and this rate is 10 times higher between the ages of 1-9. Various complications such as bleeding, infection, incomplete and insufficient circumcision, hematoma, penile adhesion, urinary retention, glanular injury, necrosis and urethral narrowing have been reported. In this book section, one of the complications, penile necrosis, will be explained in the light of the literature.