What actually is your salt intake?
"Doctors are less sure why women with PMS retain water. British physician Katharina Dalton, who has researched PMS for 45 years, has suggested that the problem is related to the fact that when women have PMS, their blood sugar levels may fluctuate abnormally--which indirectly leads to bloating.
What does this mean? In her book, Once a Month, Dr. Dalton says that when a person doesn't eat for many hours, blood sugar gets very low. This causes the body to release adrenaline, which signals the body to let go of some of its stored sugar from cells in order to balance out the blood sugar. When sugar is taken from the cells, they fill up with water, and this is what causes the bloating, weight gain and water retention symptoms in those with PMS. In women with PMS, the body reaches the point when it will release adrenaline a lot sooner than it does in other women, Dr. Dalton notes.
Other experts see a sodium link. When your blood breaks down progesterone--as it does a week before your period--your kidneys are prompted to retain both water and sodium. At the same time, a powerful water-retaining substance called anti-diuretic hormone may also be released, further influencing =adlinkMouseOver(event,this,5); onmouseout=adlinkMouseOut(event,this,5); onclick=adlinkMouseClick(event,this,5); href="#" target=_top>your body to hold onto fluids. "
Sugar can cause bloating in IBS for other reasons as well.