I can retract my foreskin when it is flaccid but when it's erect i cant pull it all the way back because there is a band around my penis where the skin is MUCH tighter than the rest and pretty much strangles my penis. Any help on what this may be and/or solutions would be much appreciated.
Do some web searches for stretching exercises
for the foreskin.
Have to be careful when getting advice from doctors
as some just want to cut the foreskin off so they can
charge you for it.