Nausea And Vomiting
The causes of nausea and vomiting are as follows: See also Dyspepsia.
- Psychic Reactions. Emotional shock (as sudden bad news), pain, fright, grief, unpleasant tastes, and offensive smells may trigger the vomiting mechanism.
- Drugs. Some drugs produce vomiting by irritating the lining of the digestive organs; others, by directly influencing the vomiting center in the brain.
- Poisons. Nausea and vomiting are prominent symptoms in most cases of food poisoning and poisoning by chemical substances.
- Disturbances in the Abdominal Organs. Irritation of the organs of digestion, intestinal obstruction, cancer of the digestive organs, inflammation of the appendix or gallbladder, or gallstones may cause nausea and vomiting.
- Toxicity. Nausea and vomiting occur in uremia and severe liver disease, presumably because of the toxicity these conditions produce.
- Increased Pressure Within the Skull. Head injury, brain tumor, brain abscess, and hemorrhage within the skull may cause nausea and vomiting or even vomiting without nausea, probably because of interference with the blood supply to the vomiting center.
- Excessive Stimulation of the Semicircular Canals. Dizziness or motion sickness typically causes nausea and vomiting by reflex influence on the vomiting center.
- Pregnancy. It is typical for an expectant mother, in the early weeks of her pregnancy, to be subject to nausea and vomiting.