Generally, reducing or eliminating the cause of the nausea will resolve the nausea itself. "If you're concerned that your nausea may be due to a COVID-19 infection, the best thing you can do is to get tested," Dr. A 2021 review article links this effect to the virus attacking the gastrointestinal system and increasing inflammation, along with anxiety brought on by the global pandemic in general. These symptoms usually appear before the classic fever and respiratory symptoms (think: wheezing and shortness of breath). According to the Centers for Disease Control, it's possible for COVID-19 to cause gastrointestinal symptoms like nausea, vomiting, and diarrhea. On that note, is nausea a sign of a COVID-19 infection? In some cases, yes (but don't panic). But if your symptoms continue for more than three days, Dr. Luckily, both food poisoning and viral infections usually clear up on their own at home, given you stay hydrated and get plenty of rest. coli, she says.) Some viral infections, like those caused by norovirus or rotavirus, can also cause nausea, along with vomiting, diarrhea, and stomach pain, she adds. (Food poisoning happens when you eat something that contains a harmful pathogen, like Salmonella or E. "Several types of infections can cause nausea, particularly those caused by food poisoning," explains Dr. "If you're experiencing long-lasting nausea, symptoms such as bloating, indigestion, diarrhea, or constipation, visit your doctor to find out the cause," says Dr. Examples include Crohn's disease and gastroparesis, a condition that slows down stomach emptying. Many other disorders of the digestive system (which includes your mouth, esophagus, stomach, and intestines) can also cause nausea. Peptic ulcers cause inflammation and pain, prompting receptors in the area to warn the brain of a gut disturbance, says Dr. Another possible (and more serious) cause is a peptic ulcer, or a sore in your stomach or small intestine. Over time, this could lead to stomach discomfort and nausea, says Casey Kelley, MD, ABoIM, founder and medical director of Case Integrative Health. For example, in gastrointestinal reflux disease (GERD), the stomach's acidic contents move up into the esophagus, causing heartburn and regurgitation. Feeling sick to your stomach might indicate a problem with, well, your stomach.
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