Arrhythmias are irregular heartbeats that can occur when the electrical signals that control the heart's rhythm don't work properly. This can lead to the heart beating too fast, too slow, or in an uneven pattern. While some arrhythmias are harmless, others can be serious and may require medical attention. Common symptoms of arrhythmias include palpitations, dizziness, or shortness of breath. Factors like stress, caffeine, or certain medications can trigger these irregularities. If someone experiences frequent or severe symptoms, it's important to consult a healthcare professional for evaluation and possible treatment options, such as medication or procedures like cardioversion.