Why do a woman urinate so much during pms? is this normal?

Due to diuresis.: Pms sxs can include feeling tearful, irritability, mood swings, anger, depressed mood, change in sex drive & anxiety. These may be accompanied by swelling of the breasts (or extremities), weight gain, abdominal bloating, cramps, nausea, ^ urinary frequency, overeating, headaches (to include migraines), dizziness, fainting & palpitations. Sleep may be disturbed with problems w acne or hives.