There is no fastest way to resolve nausea. Nausea can be caused by stomach ulcers, pregnancy, and reflux esophagitis, and is usually controlled through the use of medication. 1. Gastric ulcers: Gastric ulcers can lead to abnormal secretion of stomach acid and contraction of the stomach muscles, resulting in nausea and vomiting. In addition to giving the anti-vomiting drug metoclopramide tablets orally, it is necessary to give the drug Rebeprazole enteric-coated tablets and magnesium aluminum carbonate orally to inhibit the gastric acid and protect the gastric mucosa according to different gastric diseases. 2. Pregnancy: After pregnancy, the hormone level in the body will increase, high estrogen will stimulate the smooth muscle of the gastrointestinal tract, resulting in smooth muscle spasm, nausea symptoms. Generally, mild nausea can be left untreated, if the symptoms are serious, you can take vitamin B6 and vitamin C, etc., which can alleviate the symptoms of vomiting to a certain extent. 3. Reflux esophagitis: The reflux of gastric and duodenal contents induced by relaxation of the sphincter in the lower esophagus produces gastric acid reflux with symptoms of heartburn, abdominal pain, and often nonspecific nausea. Acid-suppressing drugs and mucosal protectants, such as rabeprazole and magnesium-aluminum suspension, may be prescribed. If nausea occurs and the symptoms persist or worsen, you need to go to the hospital in time, do not blindly use drugs, so as not to miss the best treatment period for serious diseases.