Awareness of vaginismus may not happen until vaginal penetration is attempted. Reasons for the condition may be unknown.A few of the main factors that may contribute to primary vaginismus include:

chronic pain conditions and harm-avoidance behaviour
negative emotional reaction towards sexual stimulation, e.g. disgust both at a deliberate level and also at a more implicit level
strict conservative moral education, which also can elicit negative emotionsPrimary vaginismus is often unknown cause.Vaginismus has been classified by Lamont according to the severity of the condition. Lamont describes four degrees of vaginismus: In first degree vaginismus, the person has spasm of the pelvic floor that can be relieved with reassurance. In second degree, the spasm is present but maintained throughout the pelvis even with reassurance. In third degree, the person elevates the buttocks to avoid being examined. In fourth degree vaginismus (also known as grade 4 vaginismus), the most severe form of vaginismus, the person elevates the buttocks, retreats and tightly closes the thighs to avoid examination. Pacik expanded the Lamont classification to include a fifth degree in which the person experiences a visceral reaction such as sweating, hyperventilation, palpitations, trembling, shaking, nausea, vomiting, losing consciousness, wanting to jump off the table, or attacking the doctor.Although the pubococcygeus muscle is commonly thought to be the primary muscle involved in vaginismus, Pacik identified two additionally-involved spastic muscles in people who were treated under sedation. These include the entry muscle (bulbocavernosum) and the mid-vaginal muscle (puborectalis).
Vaginismus is a condition in which involuntary muscle spasm interferes with vaginal intercourse or other penetration of the vagina. This often results in pain with attempts at sex. Often, it begins when vaginal intercourse is first attempted.The formal diagnostic criteria specifically requires interference during vaginal intercourse and a desire for intercourse. However, the term vaginismus is sometimes used more broadly to refer to any muscle spasms occurring during the insertion of some or all types of objects into the vagina, sexually motivated or otherwise, including the usage of speculums and tampons.The underlying cause is generally a fear that penetration will hurt. Risk factors include a history of sexual assault, endometriosis, vaginitis, or a prior episiotomy. Diagnosis is based on the symptoms and examination. It requires there to be no anatomical or physical problems and a desire for penetration on the part of the woman.Treatment may include behavior therapy such as graduated exposure therapy and gradual vaginal dilatation. Surgery is not generally indicated. Botulinum toxin (botox), a muscle spasm treatment, is being studied. Estimates of how common the condition is vary. One textbook estimates that 0.5% of women are affected. Outcomes are generally good with treatment. Signs and symptoms
Severity and pain during vaginal penetration varies. Causes
Primary vaginismus
Vaginismus occurs when penetrative sex or other vaginal penetration cannot be experienced without pain. It is commonly discovered among teenage girls and women in their early twenties, as this is when many girls and young women first attempt to use tampons, have penetrative sex, or undergo a Pap smear.