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 and Risk
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.