I was told that my swelling and water weight gain during my menstrual cycle may be a huge cause to my menstrual migraines. That is can cause my brain to swell as well, and that I need to be taking a diuretic. Can this be true, have never heard this before but I do know that for me water retention is a huge problem. I often go up to almost two sizes carring water weight gain. Any info would be great.