The fundamental process causing all diarrheal diseases is incomplete absorption of water from intestinal luminal contents. Water itself is not actively transported across the intestinal mucosa but moves across secondary to osmotic forces generated by the transport of solutes, such as electrolytes and nutrients. Normally, absorption and secretion take place simultaneously, but absorption is quantitatively greater. Either a decrease in absorption or an increase in secretion leads to additional water within the lumen and diarrhea. Excess stool water then causes decreased stool consistency. Blind loop syndrome is associated with abdominal surgery also, and there researches and prevention techniques are under evaluation for this particular case.