Nausea is a feeling of discomfort in the stomach that often leads to the urge to vomit. It can be caused by various factors, including motion sickness, food poisoning, or certain medical conditions. Nausea can also be a side effect of medications or treatments, such as chemotherapy. The sensation of nausea is typically accompanied by other symptoms, such as sweating, increased salivation, or a feeling of unease. It is important to identify the underlying cause of nausea to determine the appropriate treatment. In some cases, remedies like ginger or over-the-counter medications may help alleviate the symptoms.