The most important thing about treatment is to make sure you know what the cause is. There are a number of reasons for pain in the lower body and the vagina, and if the cause is not found, you could have the wrong treatment.

First Step

As a start, see your doctor. If you have had a baby recently, see your gynaecologist. There can be tiny folds or cracks or bits of a scar which can give bad pain.
Visit a Well Woman Clinic if you have not had a check up for a while. Go to the Genito Urinary Clinic if you think it would be wise to have a total check for any infection They are very expert, completely confidential, and will treat anything that is going on. If you have vulval pain that seems not to be any of these, it could be one of the vuvlval pain syndromes, like Vulvodynia.

 Visit http://www.vulvalpainsociety.org for more information.

If all is well Medically...

1. The most likely reason is that you are not turned on enough when you have sex. See Arousal Difficulties for more about this.
2. Another reason is that the relationship you have is not working for some reason and you are angry but not showing it.
3. The pain may be "in your head". People think this means you are making it up, but it is a real pain. It is very likely to get better with Sex Therapy and a therapist will take you through this at a pace which is right for you. Any hidden bad feelings that you have, can be talked about and got better in the therapy.

If it does not get better...

Some pains are there for no reason. There is nothing wrong, but sex hurts. If this is so, you may be able to find ways of not minding the pain. Self Hypnosis is a very good way. Sometimes people find the pain stops after a minute or two. Some people take pain killers, but this can spoil the nice feelings of sex. Sometimes the pain goes away on its own. Don't give up.

http://www.vulvalpainsociety.org/html/selfhelp.htm