Seizures are one of the most important symptoms of brain tumors, according to oncologist Catherine McBain, The Independent reported. According to the oncologist, if such seizures occur with a healthy person, this is a serious reason to consult a specialist. Weakness is also considered an alarming symptom, especially if this sensation appears on one side of the body and intensifies over several weeks. Brain problems can also be indicated by speech disorders, slurred pronunciation, or confusion in words. Symptoms such as blurred vision, especially if accompanied by other symptoms listed above, cannot be ignored either. But headaches without other manifestations, according to a specialist, rarely indicate tumors. However, if the pain is unusual, different from the previous one, and worsening, it is worth visiting a specialist.