Wikipedia is where I got the reference for women experiencing this. It is refered to as Pelvic Congestion Syndrome. Symptoms can include;

The chronic pain that is associated with this disease is usually dull and aching. The pain is usually felt in the lower abdomen and lower back. The pain often increases during the following times:

* Following intercourse
* Menstrual periods
* When tired or when standing (worse at end of day)
* Pregnancy

Other symptoms include:

* Irritable bladder
* Abnormal menstrual bleeding
* Vaginal discharge
* Varicose veins on vulva, buttocks or thigh.


Sources for my research:
*MODS THESE ARE NOT COMMERCIAL SITES*
en. wikipedia.org/wiki/Blue_balls
www. veins1.com/care/condition20.cfm/14
www. sirweb.org/patPub/chronicPelvicPainInWomen.shtml