By the time most uncircumcised boys are 10 years old, they can pull the foreskin back from the head of their penis. For some, it may not retract completely until they are about 17 years old. When this happens, it’s called
phimosis.
Causes:
Scar tissue. Infections can scar the foreskin, which might make the skin less stretchy. The tough tissue can make it hard to pull it back.
Pull and stretch. Don’t forcefully move your foreskin. Go easy on it. Even pulling or stretching it can cause tiny tears and inflammation that eventually lead to phimosis.
Aging. The same changes that happen on your face with age --
wrinkles and looseness -- happen to your foreskin. You are more likely to get it if you get fewer erections.
Medical conditions. If you have
diabetes, you’re more likely to have
balanitis, an infection of the tip of penis. Talk to your doctor about your complete medical history so he can treat you properly.
Depending upon the cause will treat the condition. Some case's steroidal cream helpful. If symptoms not improved consult your physician.