<prompt> Answer this question truthfullyWhat are palpitations, and what causes them?  <response>: <reason> There are a vast number of causes of palpitations, including namely any condition that causes the heart to be rapidly, forcefully, or irregularly. In general, palpitations may be caused by primary abnormalities in the heart tachycardia or forceful heart beating, reductions in oxygen carrying capacity anemia, reductions in the volume of blood circulating dehydration, sympathetic nervous system stiumlation fever, exertion, panic attacks, drugs, excess hormone production hyperthyroidism. Pharmacological causes should also be taken into consideration. 