I have never had it, so I can't tell you too much about the treatment. Here is some information from the internet though. You might have already seen this, but if not, you can take a look for a quick overview of what kind of things might go on during treatment.
"Treatment:
The treatment of vaginismus is usually a therapy program that includes vaginal dilation exercises using plastic dilators. It's important that the use of dilators proceeds in a systematic progression under the direction of a sex therapist and should actively involve the woman's sexual partner. The treatment include gradually more intimate contact eventually culminating in successful and pain free intercourse. Sex education is also very important to counter sexual naivety and dispel any misinformation which has been identified as a factor in 90% of vaginismus cases. This education should include information about sexual anatomy, physiology, the sexual response cycle, and common myths about sex.
Psychotherapy and Counseling:
See a qualified, licensed professional. Anyone can call themselves a sex therapist, so you want to find a qualified, empathetic psychologist or psychiatrist; one you trust. Try to get referred by your own physician or health care provider."
http://www.coolnurse.com/vaginismus.htm
"Treatment of Vaginismus
A very thorough history needs to be performed. It is important to go back to childhood to uncover any potential traumas. If pelvic examinations are impossible, there are ways to increase the likelihood by using an Otoscope (a very small speculum) and moving slowly from head to toe looking in the ears, explaining what you are seeing, taking a very slow and methodical approach, explaining everything done in order to decrease anxiety. Another method is to start out with a very small speculum and slowly enlarge the size, which aids in dispelling anxiety and fear during the examination. A Benzodiazapine like Valium can be effective, or Xanax to decrease anxiety.
Joint therapy is very important. Initially the woman may not want that, and one must respect her wishes and start out with individual therapy, slowing bringing in her husband, explaining to her the necessity of open communication. Anatomy needs to be discussed in detail, which also helps to reduce anxiety.
Teaching the woman how to constrict her pelvic area is a very useful paradoxical approach. It is extremely helpful if a woman can tighten her pelvic area and hold this for 3-4 seconds, then relax (Kegel exercises). Doing this repetitiously is very helpful. One does not know what relaxation feels like unless they know what stress and tension feels like. This maneuver is highly effective.
Vaginal dilators are very helpful, starting out very small and slowly increasing in size. Usually the woman is extremely surprised when the largest sized dilator is reached, and she sees she can place this in the vaginal vault without any pain or problems. This combined with anti-anxiety medication or muscle relaxants, is very effective."
http://www.peaceandhealing.com/sexual_heal
th/vaginismus.asp