Your present or past medical history as a matter of fact may not give much clue to arrive or zero down a condition (But Labyrinthitis may be connected to it). So physical evaluation is important to get the clues, either for the diagnosis or getting the guidelines for the investigations. Nausea is the unpleasant, painless sensation that one may potentially vomit. Nausea significantly affect quality of life. The causes of nausea are iatrogenic (doctor induced like medicines), toxic, or infectious causes; gastrointestinal disorders; and central nervous system or psychiatric conditions. Following are the main causes;
A. Central nervous system
2) Space occupying lesion in brain (Mass lesion)
4) Ménière's disease
5) Pseudotumor cerebri
B. Gastrointestinal symptoms;
2) Irritable bowel syndrome
3) Non ulcer dyspepsia
4) Peptic ulcer disease
5) Cholecystitis/cholangitis (gall bladder problems)
6) Hepatitis (liver inflammation)
1) Thyroid disorders
3) Adrenal disorders
D. Psychiatry disorders
3) Conversion disorders
Chronic nausea is usually a pathologic response to any of a variety of conditions. Gastrointestinal etiologies include obstruction, functional disorders, and organic diseases. Central nervous system etiologies are primarily related to conditions that increase intracranial pressure, and typically cause other neurologic signs.
Numerous metabolic abnormalities and psychiatric diagnoses also may cause nausea. Evaluation should then turn to identifying the underlying cause and providing specific therapies. When the cause cannot be determined, empiric therapy with an anti vomiting (antiemetic) medication is appropriate. Initial diagnostic testing should generally be done by basic laboratory tests and plain radiography. Further testing, such as upper endoscopy or computed tomography of the abdomen, MRI of the brain, should be determined by clinical suspicion based on a complete history and physical examination.
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