Feeling dizzy can be caused by a variety of factors, including issues with blood circulation such as low blood pressure or poor blood flow to the brain, inner ear problems that affect balance, dehydration, low blood sugar, medication side effects, anxiety, anemia, or overheating. Other causes could be neurological conditions, motion sickness, or even carbon monoxide poisoning. If dizziness is severe, frequent, or accompanied by other symptoms like weakness, fainting, or confusion, it is important to seek medical advice to determine the underlying cause and appropriate treatment.