Some babies develop a small area of fat at the base of the penis during the first year of life. This is normal and can cause some of the skin of the penis to get pushed up and cover part of the head of the penis. The penis may look buried or uncircumcised. Following a circumcision, it is important to gently retract the skin to the base of the head of the penis several times a day to prevent the foreskin from reattaching to the head of the penis.
As your infant grows, this should get better with more of the tip of the penis showing all the time. Not all babies have this fat pad, so the look of the circumcision is not always the same in different children, even when the correct amount of skin is removed during the circumcision.