Sorry to hear about your pain. There are a number of potential solutions, but my first recommendation would be to go and see a doctor if it is bugging you that much. I can give general pointers about relieving pain, but since I am not in front of you examining the issue, I can't promise anything.
That being said, if it feels like a cramp/tightness, an easy thing to do would be to try drinking more water and upping your potassium intake. As a chiropractor, one thing I always do with patients who have leg/knee/calf/foot pain is also look to make sure the joints in the pelvis are moving as they are supposed to; dysfunctional pelvic motion changes how all the joints below your hips function. So, I would look into going to see a chiropractor, upping your water intake, and eat/drink your favorite fruit/veggie/etc. with potassium in it.
Hope this helps!
The word Myofascial can be broken down to Myo and Fascia: myo referring to muscles and fascia referring to the type of tissue connecting muscles and bones (more of less). Myofascial pain syndrome is a diagnosis referring to pain between those tissues most commonly from overuse of a muscle from repetitive activities. It is not serious as a stand alone issue, in that there are no life threatening complications from this diagnosis on its own; however, it does take some time to fix this as it is a condition that occurs over a long course of time. As far as her treatment, it really depends on the provider. Some would approach this condition with a dietetic approach to reduce general inflammation in the body; some would work on re-education of the overused muscles to reduce inflammation through improved function. Hopefully this helps!