What are the causes of nausea&lightheadedness?
Nausea and light headedness, which often precede vomiting, are not the end result of a specific infection or environmental factor, but rather the symptoms of a myriad of medical issues.External CausesSome causes of nausea that do not originate inside the body are motion sickness, food or drug reactions, allergic reactions, overeating, concussion or head injury, or unpleasant odors.Internal CausesSome biological processes or internal diseases can cause nausea. These include intense pain (from some other source), emotional stress, gall bladder disease, heart attack, brain tumors and gastroperesis.VertigoIf nausea is severe enough to impair motor skills and vision, and is not accompanied by vomiting or the urge to vomit, it may be a sign of a more serious condition like vertigo (lightheadedness or dizziness).PregnancyFifty to 90 percent of women in the early stages of pregnancy experience nausea.
