The biggest danger is the failure to identify the health condition at its early stages due to the similarity of symptoms with many other unfavorable health conditions. The doctors often name supporting factors such as run-of-the-mill nausea among those keys which can help to determine the exact diagnosis. The upset stomach makes the problem rather sharp and obvious. In this case, the person should not relate the upset feeling to the taken meals. Intermediate phase of the illness is the last moment doctors can cure the illness with the minimum of adverse consequences.