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Nausea



Nausea is defined as the intense urge to vomit. It may not result in the actual act of vomiting but it causes one to feel sick and uneasy. Nausea is a condition, rather than an actual illness, that may have underlying physical or psychological causes.


Causes and Risk Factors

There are several factors that may incite nausea in an individual. Not all of these factors are related to gastrointestinal troubles such as infections in the liver, stomach, esophagus, small intestine, and pancreas. Lack of oxygen supply to the brain due to a brain injury or infection also causes a queasy feeling.

Additional causes of nausea are traveling or motion sickness, morning sickness caused by pregnancy, food poisoning, overeating (including binge eating), indigestion, stress, depression, anxiety, and viral infection. There are several other medical conditions and diseases that may cause nausea such as vertigo, migraine, appendicitis, stomach flu, and diabetes. Cancer patients receiving chemotherapy and radiation therapy also experience frequent nausea.



Certain medications such as antibiotics and antidepressants may cause a queasy feeling as a side effect. Intolerance of alcohol, caffeine, and recreational drugs such as cocaine and heroin may also cause nausea. Being near foul-smelling objects or in a pungent environment may also lead to nausea. Witnessing catastrophes, viewing dreadful sights, or experiencing a terrible tragedy can also cause nausea in some individuals.

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