Causes of Nausea
Nausea symptoms are the queasy feeling you usually have before you vomit. Vomiting is the forceful emptying, or the throwing up, of the stomach’s contents through the mouth. Nausea and vomiting are symptoms that may occur with many conditions and situations, including before or after a colonoscopy. Other causes of nausea are the stomach flu, which is an infection caused by a virus. Some people get motion sickness, which is being “seasick” or “carsick”. The foods we eat are also nausea causes via food poisoning or other infections. Alcohol use and abuse cause a great amount of dizziness nausea since alcohol directly triggers feelings to nausea and causes people to expel the alcohol.
There are many other nausea causes including exposure to unpleasant odors or sights and pregnancy. Sometimes nausea can indicate more serious conditions like a heart attack or a head injury. Some people may even have nausea and vomiting when they have stress and anxiety or inner ear disorders. Lastly, sometimes people have these symptoms as a result of specific medicines such as cancer treatment. In the case of a colonoscopy, the symptoms are normally a result of the lack of food in the belly and the emptiness of the colon before the procedure.
Vomiting can exist to protect the body by getting rid of harmful substances. But vomiting often or for a long time can lead to dehydration, which is the loss of too much fluid from the body. Becoming dehydrated can be very dangerous, especially for people who have other medical problems. To avoid this, the person needs to replace the lost fluids. At first the person should rest the stomach for a few hours by eating nothing solid and sipping only clear liquids. A little later the person can eat soft bland foods that are easy to digest. If anyone has been vomiting a lot, it is best to have only small, frequent sips of clear liquids. Drinking too much at once, even an ounce or two, may actually cause more vomiting.
Clear liquids that anyone can drink are water, weak tea, bouillon, apple juice, and sport drinks. It may be easier to keep down liquids that are cold since they do not trigger as much of a response. People can also suck on ice chips or popsicles if they feel too nauseated to drink fluids. The choice of liquids is important. If water is the only liquid a person can drink without vomiting, that is OK for a few hours. However, if the person has been vomiting for several hours, they must replace the minerals that are lost. Avoid liquids that are acidic or caffeinated or have a lot of carbonation. If the person has diarrhea as well as nausea or vomiting, do not drink milk as that can make the nausea symptoms worse.