I have really tight foreskin ( phimosis) when im erect its almost impossible to retract my foreskin past the glans of my penis without it hurting i read that when you have phimosis and you get circumcised your penis looks bigger is this true?

Not really: The ways to stretch a tight foreskin varies, depending on age, tightness, presence of foreskin infection, and the dedication of the patient. With no infection, stretching is less urgent and can be more gradual. After puberty, stretch stronger. Some patients hold the skin back near the base of the penis, and let an erection do the stretching. Call Dr. if foreskin is "stuck" behind "head" of penis.