Typically, the waste of digestion (stool) gets out of the body through intestines by muscular contraction. In the colon, most of water and salt of the waste are reabsorbed because it is necessary for the body. However, when the intestines absorb too much water or the colon contracts slowly, the stool becomes dry, hard and difficult to pass through the colon. This is the root cause of constipation.
It’s been used for thousands of years in Asian medicine to treat stomachaches, diarrhea, and nausea, and studies show that it works for nausea and vomiting. There’s some evidence that it might help with menstrual cramps, too. But it’s not necessarily good for everyone. Some people get tummy trouble, heartburn, diarrhea, and gas because of it, and it may affect how some medications work. So talk to your doctor, and use it with care.