Nausea is the unpleasant urge to vomit. It often occurs along with vomiting or prior an episode starts but can also occur without vomiting.
It is important to note that nausea is a way the body responds to a variety of irritants. Different factors might result to constant nausea. If the individual experiences one continuously, a doctor should be consulted.
Food poisoning is a usual cause of constant nausea which is triggered by consumption of food or water that has been contaminated by toxins, parasites, viruses or bacteria.
Staphylococcus and E. coli are the common bacteria responsible for most cases of food poisoning. Botulism, salmonella, listeria and cholera can also cause the condition. Aside from constant nausea, other symptoms are present such as fever, stomach cramps, chills, diarrhea, weakness and headache.
Viral gastroenteritis or stomach flu might develop after sharing food or items with an infected individual or consumption of infected beverages or foods. The individual might suffer from constant nausea along with stomach pain, low-grade fever, vomiting, headache, watery diarrhea and muscle pain.
Hepatitis is characterized as inflammation of the liver. It is caused by a parasitic, viral or bacterial infection, autoimmune response, certain medications and alcohol or poisonous related liver damage.
Constant nausea is also an initial sign of hepatitis as well as a symptom that manifests as the condition progresses. Other possible indications include dark-colored urine, abdominal pain, appetite loss, clay-colored or pale stools, vomiting, breast development among males, low-grade fever, fatigue and weight loss.