heart attack, arrhythmia, cardiomyopathy, stroke, tumor, headaches, migraines, dementia, medications like blood pressure medications, sedatives, anti depressants, antibiotics, diuretics etc, metabolic disorders like hypoxia,
hypoglycemia, dehydration etc. other possibilities are internal bleeding, anemia, prolonged bed rest, infections, endocrine diseases, allergies etc. psychiatric reasons for dizziness are depression, anxiety, panic disorder etc.