The hormone that is to blame for constipaiton in women before period is progesterone. Prior to the onset of menstruation, there is a spike in the progesterone levels.
Although this is necessary for menstruation, it can affect your digestive system by delaying the time it takes to move food through the bowels.
Just after ovulation, the level of progesterone, which is a muscle relaxant, drastically increases. At the same time, this relaxing effect is slightly constipating. In case your progesterone levels are very high, you may feel it difficult to get things moving down there.
On ther other hand, PMS constipation typically eases once menstruation starts. Just before you get your period, your progesterone levels fall rapidly, and you start developing diarrhea as the hormone responsible for slowing everything down is suddenly absent.
Another reason for diarrhea during PMS is the increased amount of prostaglandins - hormone-like substance that is produced by endometrial cells. If produced in an extremely large amount, prostaglandins can get into the muscle that lines your bowels. There it can cause your intestines to contract and push out things down there quickly.
Prostaglandins can also cause contractions during any stage of pregnancy.
Increasing your fiber intake is your best weapon against constipation. This can be done through regular meals that include whole wheat bread, high-fiber cereals, and an assortment of fruits and vegetables.
Avoid foods rich in fat and sugar.
Regular fluid intake is also important, especially water.
When you exercise, you are improving blood and oxygen circulation which, in turn, will keep your bowels moving. This will help relieve premenstrual symptoms, including constipation, and improve your health.
Changes in your bowel movements, such as constipation, diarrhea, and bloating can be logged in Flo, so you can find the correlation between these symptoms and any week of your menstrual cycle.
If nothings helps and you still suffer from constipation or irregular bowel movements, seek professional help to exclude any severe disorders.