Vasopressin has three main effects: 1  Increasing the water permeability of distal convoluted tubule and collecting duct cells in the kidney, thus allowing water reabsorption and excretion of more concentrated urine, i.e., antidiuresis.
It can be caused by damage to the vagus nerve, which regulates the digestive system. A damaged vagus nerve prevents the muscles in the stomach and intestine from functioning, preventing food from moving through the digestive system properly. Often, the cause of gastroparesis is unknown.
Other health issues that can cause stomach distension are celiac disease, diverticulitis, abdominal tumor, intestinal disorder, cyst in the ovary, cancerous growth in the ovary, fibroids in the uterus, and increase in the accumulation of fluid inside stomach, increased acidity and malnutrition.