Pre-Menstrual Syndrome (PMS) is a predictable or unpredictable pattern of physical and mental occurrences before the onset of menstruation in women. The symptoms are unnoticeable, moderate or intense. They vary from woman to woman. The physical symptoms are - Headache - Weight gain - Breast tenderness - Muscle and joint weakness and pain - Constipation or diarrhea - Acne - Bloating - Fatigue and exhaustion The emotional and mental symptoms are - Anxiety - Episodes of crying - Mood swings - Food cravings - Sleep disturbances - Food cravings - Change in libido - Social withdrawal