My penis won't retract when erect, but it does when flaccid. there is a white ring at the tip of the foreskin. also, my "peehole" is kind of reddish. what is this? im scared answer please

This : This may be a condition known as phimosis, where the foreskin is inflamed and may become difficult to retract. When the glans, or head, of the penis is engorged during an erection, the tight ring of inflamed tissue may not allow the foreskin to retract. It is typically treated by circumcision, or in some cases topical steroid creams or ointments. You should be examined to your physician to confirm this diagnosis.

Unclear question: It sounds like you mean your foreskin won't retract when erect, but your history says you are circumcised. The tip of your penis is red. No need to be frightened. Please see your doctor. You may have an infection. He/she can also help you determine if you need anything done to help w/the retraction of your foreskin. Peace and good health.