In majority of cases palpitation
is due to anxiety
which is shortlived and gets cured of its own. There is a disease which is regarded as sinus tachycardia
which has got no aetiology but palpitation comes suddenly and calls for some rest or treatment generally tranquilizer to eradicate anxiety. Avoid acidity and gas these too can cause palpitation. Light diet deep breathing and meditation
can cure without medicine.