Hello! Thanks for your query. You do need to worry because most heart palpitations are harmless and they resolve on their own without treatment. Rarely ,heart palpitations are a sign of a serious condition. When you become overly aware of your heart beat , sometimes you can feel this sensation on your neck,chest ect. Heart palpitations can be caused by a wide variety of things: caffeine strenuous exercise alcohol anemia dehydration smoking hyperactive thyroid ect The cause of heart palpitations may be difficult to diagnose but if your palpitations are due to controllable lifestyle choices such as smoking,too much caffeine simply cutting down or eliminating those substances may be at all is needed. Take care of your self