Most have a few that recur each month. Generally, PMS is recognizable because it comes and goes at the same time each month. However, if in doubt about whether you have PMS or another condition, see your doctor. There's still some disagreement about what causes PMS, but it definitely seems to be linked to hormones. Then, about seven days before the menstrual period, production of both progesterone and another female hormone, estrogen, decreases dramatically.
Hormone imbalances are more likely the closer a woman is to menopause.
You may be able to tell whether you have PMS by keeping a diary of your symptoms. This will help you see whether they follow a monthly pattern. While there's no cure for PMS, self-help measures can ease symptoms. Many women find that a balanced diet and healthy snacks are helpful, as are avoiding caffeine and reducing salt intake. Stress reduction methods and daily exercise may also offer relief.