Premenstrual syndrome, or PMS, is a term which describes symptoms seen just prior to the onset of menstruation. Normal periods are associated with marked hormonal changes, which have complicated effects on female physiology. It is now thought that these hormonal changes cause psychological effects as well, particularly in the days preceding the onset of the menstrual period.
Common symptoms include mood swings, increased aggression, and instability. Physical symptoms of ankle swelling, lower abdominal pain and bloating can make matters worse.
Your physician may prescribe an anti-inflammatory agent (ibuprofen) in order to decrease the symptoms associated with PMS.