Approximately 7,000 people in Germany are diagnosed with a brain tumor annually. Often, initial symptoms are not immediately associated with cancer by those affected. The German Brain Foundation highlights four warning signs that should prompt medical attention, with visual disturbances being among the most significant. Surprisingly, headaches are considered a less common symptom of brain tumors. Early detection is crucial for effective treatment, and awareness of these warning signs can contribute to quicker diagnoses. The foundation aims to educate the public about recognizing potential indicators beyond typical symptoms. Individuals experiencing these warning signs are encouraged to seek professional medical evaluation.