Many parts of the body conspire to cause nausea, the inner ear, the stomach, the nose or the blood can send signals to the brain that the body has ingested something, or is around something, that is bad for it. A nauseated feeling is an evolutionary adaptation to eject food that was rotten or toxic. Nausea can stem from food poisoning, but also from an overindulgence in fatty foods, alcohol or caffeine, or gross smell can make you feel worse.
Motion sickness, a common cause of nausea, is poorly understood.
Once queasiness has taken over, liquids are the fastest remedy. If you are nauseated, drink anything that you can keep down. There is very little scientific data comparing one beverage’s efficacy to another, so the best thing is to listen to your body.
Fizzy, sugary beverages can sometimes alleviate nausea better than plain water. Carbonation can help to reduce the total acidity of the stomach, which may help the nausea dissipate.
People associate sweet flavors with contentment, a soda might further help bring that queasy feeling under control. In addition, cola has the same ingredient, phosphoric acid, found in an effective over-the-counter anti-nausea drug.
Ginger, too, is often recommended to patients suffering from nausea, most studies are done with pregnant women who take supplemental ginger tablets, and they show that the root can dampen queasy feelings, ginger tea, Ginger ale, can all help.
Studies have shown that coconut water is as good as sports drinks for replacing lost fluids after exercise and cause less nausea, but these were small studies, and were not looking at nausea specifically, coconut water is a healthy liquid, and almost any non-caffeinated, non-alcoholic liquid a person can keep down will help nausea subside.
To help ease the queasy feeling, you should avoid alcohol and caffeine and stick to whatever tastes good and can be kept down.