How Can Vaginal Tightness With Pain During Intercourse Be Treated?

dr, i'm asking this for my wife who is 26 yr old. we are newly married. she's having severe pain during intercourse and is not showing any interest in sex because of pain. is it because of her vagina because i felt it as very tight during the intercourse.we have enough foreplay and i felt her vagina well lubricated. please advice