PMS is used to describe a range of symptoms that occur in women after ovulation and usually ends when menstruation starts.
What causes Premenstrual Syndrome?
The cause of PMS is not well understood. There are several theories which look at:
changes in sex hormone levels
changes in brain chemicals that affect mood
Symptoms of PMS
Symptoms of premenstrual syndrome may vary from month to month and in some months may be more severe than others.
PMS and sore breasts and nipples
One of the most common symptoms you may experience as a result of premenstrual syndrome is sore breasts and nipples. Excessive water stored in the body leads to bloating which is the main cause of sore breasts after ovulation. Accummulation of water in the breast tissues leads to stretching of the skin and puts the other tissues under tension which accounts for the soreness.
Other physical symptoms of PMS
Other physical symptoms of PMS include:
sleep disturbances (sleeping too much or too little)
changes in appetite (food cravings and overeating)