Depending on the nature and intensity of the pain, Pelvic pain can be divided into Acute pain- in which the pain starts suddenly with intense severity, and chronic pain- where the pain can either be intermittent or constant but lasts for several months. The intensity may increase right before or during the menstrual periods. Pelvic pain is termed as chronic when constant pelvic pain, with no improvement, lasts for more than 6 months despite of treatment. Read More :- http://valleyobcare.com/Pelvic-Pain.html