As your child gets older, the foreskin of his uncircumcised penis will begin to separate from the tip of the penis. Care of the uncircumcised The penis uncircumcised. I'm not planning to have my newborn circumcised. How should I care for his uncircumcised penis? If your The penis uncircumcised isn't circumcised, simply wash his penis with nonirritating soap and water during each bath.