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.
Although the stomach flu and food poisoning share some common symptoms such as diarrhea, nausea and vomiting, stomach cramps, muscle aches, for example, they are not exactly the same condition. Stomach flu or gastroenteritis means any nonspecific inflammatory problem in the gastrointestinal tract; some doctors consider the stomach flu to be more narrowly defined as a viral infection that attacks the digestive system.