it is a sexual disorder. the essential feature of vaginismus is the recurrent or persistent involuntary contraction of the perineal muscles surrounding the outer third of the vagina when vaginal penetration with penis, finger, tampon, or speculum is attempted. the disturbance causes marked distress or interpersonal difficulty. in some females. even the anticipation of vaginal insertion may result in muscle spasm. the contraction may range from mild, inducing some tightness & discomfort, to severe, preventing penetration.