Feeling dizzy can be caused by a variety of factors. Some common reasons include inner ear problems that affect balance, reduced blood flow to the brain due to low blood pressure or dehydration, low blood sugar, certain medications, anxiety or stress, and conditions such as anemia or overheating. Dizziness may also result from motion sickness, migraine, or side effects of some medicines. If the dizziness is severe, recurrent, or accompanied by other symptoms such as numbness or pain, it is important to seek medical advice for an accurate diagnosis and appropriate treatment.