The first thing you should look for when examining the foreskin is whether it is circumcised or whether it is overcircumcised, which is an observation from the outside. Hypospadias is a loose opening of the foreskin, which can be easily pushed back to the back of the glans and the coronal sulcus. Whereas, phimosis is when the opening of the foreskin is small and it cannot be turned back to expose the glans and the coronal sulcus. When checking the foreskin, after turning the foreskin, you should check whether there is redness of the glans, whether there are new organisms in the coronal sulcus, whether there is cauliflower pattern at the inner plate of the foreskin and glans, or whether there is ulcer-like change, which can determine whether there is circumcision and glans, and penile cancer. For the discovery of prepuce, early surgical treatment is recommended.