Nausea is not an illness. It is also known vomiting and emesis. Vomiting is forcing the contents of the stomach up through the esophagus and out of the mouth. Nausea is the sensation of unease and discomfort in the stomach with an urge to vomit. Nausea can be acute and short-lived, or it can be prolonged. It can originate from problems in the brain or organs of the upper gastrointestinal tract. Nausea is often indicative of an underlying condition elsewhere in the body. Nausea is also a common symptom of pregnancy. Mild nausea experienced during pregnancy can be normal, and should not be considered an immediate cause for alarm. Travel sickness, which is due to confusion between perceived movement and actual movement, is an example.

The sense of equilibrium lies in the ear and works together with eyesight. When these two don't "agree" to what extent the body is actually moving the symptom is presented as nausea even though the stomach itself has nothing to do with the situation. Nausea is also an adverse effect of many drugs. Some examples of serious conditions that may result in nausea or vomiting include concussions, meningitis (infection of the membrane linings of the brain), intestinal blockage, appendicitis and brain tumors. Another concern is dehydration. Adults have a lower risk of becoming dehydrated because they can usually detect the symptoms of dehydration (such as increased thirst and dry lips or mouth).

Nausea also may be caused by non-gastrointestinal organs of the body. The causes of vomiting differ according to age. For children, it is common for vomiting to occur from a viral infection, food poisoning, milk allergy , motion sickness, overeating or feeding, coughing, or blocked intestines and illnesses in which the child has a high fever. Nausea or vomiting one to eight hours after a meal may also indicate food poisoning. Drugs and alcohol is also mild cause of vomating or nausea. Nausea may also be an effect of a large intake of sugary foods.

Most of the time, nausea and vomiting do not require urgent medical attention. However, if the symptoms continue for days, they are severe, or you cannot keep down any food or fluids, you may have a more serious condition. Symptomatic treatment for nausea and vomiting may include short-term avoidance of solid food. If vomiting and diarrhea last more than 24 hours, an oral rehydrating solution such as Pedialyte or Rehydrate should be used to prevent and treat dehydration. Drinking gradually larger amounts of clear liquids. Drink liquids between meals instead of during meals and drink at least six to eight 8-ounce glasses of water a day to prevent dehydration.

Home Remedy for Nausea
1. Ginger
Most rightly known as ‘glorious ginger’, this root is your best bet against nausea. Be it in the form of ginger ale, tea, capsules or even raw, ginger can relieve nausea in minutes. The volatile oils and pungent phenolic compounds present in ginger promote the secretion of digestive enzymes that can neutralize stomach acids and bile, and alleviate nausea symptoms. While there are innumerable ways to eat ginger, the best way to calm a nausea flare up is to sip on some fresh ginger tea or ale.

2. Lemon
The citrusy smell of this fruit can cut through the murky feeling of nausea by calming your stomach. Lemon aids in balancing the body’s natural pH levels and can treat nausea arising from gas, bloating, stomach flu, heartburn or an upset tummy. Suck on a fresh lemon (half piece) until you find relief. You can also mix lemon juice with equal amounts of honey and eat ? cup of this mixture for immediate relief. (Related Article: Lemon: Natural Remedy For Aging Skin)

3. Peppermint
The fresh minty scent of peppermint has the remarkable ability to tame an upset stomach and thus take care of nausea. The antispasmodic property of peppermint along with its calming effect soothes inflamed stomach lining and prevents nausea and cramping. For quick relief, dab some peppermint oil (one to two drops) on some cotton and dab the same on your gums. Alternatively, brew a herbal tea by steeping eight to 10 fresh leaves or 1tsp of dried leaves in a cup of hot water and sip while still warm.

4. Fennel
Known for its carminative properties, fennel is a wonder herb that prevents the formation of gas in the stomach. If your nausea is due to digestion-related conditions such as gas or flatulence, fennel is the herb for you. It is perfect to treat pregnancy related nausea as its anesthetic compounds helps reduce queasiness. Chew on 1tsp of fennel seeds slowly for quick relief or brew a tea with 1tsp of fennel seeds in one cup of hot water. Cover and steep for 10 minutes and drink while still warm. You may also add 1tsp of lemon juice for added benefit.