In a water molecule, the oxygen atom and hydrogen atoms share electrons in covalent bonds, but the sharing is not equal. In the covalent bond between oxygen and hydrogen, the oxygen atom attracts electrons a bit more strongly than the hydrogen atoms.
Giardiasis is an infection of the small intestine causing diarrhea, gas, bloating, nausea and stomach cramps. Inflammatory bowel disease. Inflammatory bowel disease causes swelling and symptoms such as cramping, chronic diarrhea, and bleeding. Viral gastroenteritis. Gastroenteritis (stomach flu) is a viral condition that causes diarrhea and vomiting. Medication reaction or side-effect Medication side effects include nausea, vomiting, stomach upset, weakness, dizziness, seizures, and more.
Viral gastroenteritis. Viral gastroenteritis (viral infection of the stomach and the small intestine) is the most common cause of acute diarrhea worldwide. Symptoms of viral gastroenteritis typically last only 48-72 hours and include: 1  nausea, 2  vomiting, 3  abdominal cramps, and. 4  diarrhea.