Abdominal pain, Acne, Aggression, Anxiety, Backache, Bloating, Breast swelling and tenderness, Constipation, Depression, Diarrhea, Difficulty in concentration, Dizziness, Appetite changes and/or Food cravings, Fluid retention, Menstrual Headaches, Indigestion, Irritability, Loss of sex drive, Mood swings – tension, irritability, crying spells, etc.; Some muscle pain, Nausea, Stomach cramps/pain, Tiredness, Troubled sleeping, troubles with concentrating and/or remembering; Weight gain.

http://www.women-info.com/en/menstrual-period-side-effects/

notice women have the typical double standard on this subject as well. They want SYMPATHY and special treatment because they feel so bad, but don't you dare suggest they aren't suited for important high paying jobs.