5. Nausea and vomiting
These symptoms are very common in patients with brain tumors, but they are not necessarily a symptom associated with the central nervous system. It is more of a gastrointestinal manifestation resulting from an alteration in the central nervous system, which is why it is considered a nonspecific symptom in patients with brain tumors. It does not provide additional data to locate the tumor or predict how aggressive it is. Nausea and vomiting is often an accompanying symptom for the ones listed in this article, and it is considered a secondary symptom to detect brain tumors. However, it is important to report nausea and vomiting and detail when and how it happens, and whether or not there are any triggers to it.