Premenstrual syndrome (PMS) can cause physical and emotional symptoms such as mood swings, bloating, and fatigue before menstruation. To manage PMS, consider keeping a symptom diary to track patterns and identify triggers. Regular exercise and a balanced diet rich in fruits, vegetables, and whole grains can help. Additionally, techniques such as yoga, meditation, and deep breathing can reduce stress. If symptoms are severe, consult your GP about treatment options, which may include lifestyle changes or medication.