How Can I Treat A Tight Foreskin That Won’t Retract And Causes Pain With Smegma Buildup?

Hi , my penis foreskin is not pulling back and i am very tensed about this .. i can masturbate but when i try to open my penis foreskin it pains ..and a white layer of smegma is also formed ..kindly tell me the cream i should apply to get rid of this situation