A general queasiness, or feelings of nausea. One of the most misleading symptoms of appendicitis is queasiness or nausea, and as the condition progresses, even vomiting. While the intense pain associated with the disease may worry a person at first, once nausea and vomiting set in a person may convince themselves that they have little more than a stomach infection. This is exceedingly dangerous since appendicitis is almost always fatal if left untreated. This is why you need to view the symptoms as a composite whole and seek medical assistance before the condition becomes life-threatening.