Vomiting and Nausea
Mouth | General Practice | Vomiting and Nausea (Symptom)
Nausea and vomiting may occur independently of each other, but generally are related and are assumed to be mediated by the same nerve pathways so that they can be discussed together. Nausea is a feeling of imminent desire to vomit, usually seen in the throat or epigastrium. Vomiting (or emesis) is the elimination of explosive oral, forced the stomach contents. Effort to shed shows rhythmic contractions of respiratory and abdominal muscles that often precede or accompany vomiting. Nausea often precedes or accompanies vomiting. It is usually associated with diminished functional activity of the stomach and altered mobility of the small intestine.
Nausea (and vomiting) can be psychological or physical in origin. It can originate from problems in the brain or organs of the upper gastrointestinal tract (esophagus, stomach, small intestine, liver, pancreas, and gallbladder). It also may be caused by pain, motion, medications and diseases of many nongastrointestinal organs of the body. Therefore, the diagnosis of the cause of prolonged nausea may not be easy. All stimuli that cause nausea work via the vomiting center in the brain which gives rise to the sensation of nausea and coordinates the physical act of vomiting.