What causes a heart to beat hard upon one's chest?

Question:

It especially happens when i lay on my back.. I feel like it shakes my chest and i can also feel it shake my arms...etc. Could it have anything to do with my weight? i weigh 120 pounds and haven't been able to eat proper meals due to a fever i had.

Answers:
This happens to me sometimes too... I'm not surprised to hear that you're noticing it after an illness.

My best guess (and I'm not a doctor) would be that you're a bit dehydrated. Your heart is a muscle and needs plenty of water to function properly. Try to drink 80-100oz of water over the next couple days and see if that helps.

Good luck and don't panic. The heart is a strong and very complex organ. As long as you're not having serious chest pain (tightness, etc) or passing out, it's probably nothing serious.

What causes a heart to beat hard upon one's chest?

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