Can someone please help me understand why I feel my heart beating hard a lot?

It is not beating fast, just beating hard. It feels like I go into flight or fight mode for almost no reason or it feels like adrenaline pumping through my body for no reason. It seems to happen more when I am tired.

Why does this happen so easily? Is there anything I can do about it?

The thing I worry about is if it is doing long-term damage to my heart - is this possible?

Thank you

Ive asked my proffesionals the same question...I also can start shaking...

I was told that my brain is releasing some chemical that makes it do it...adrenaline is a word but I cant remember the medical term of it?

I get what I term surges of something being pumped into me...I can feel the anxiety and energy flow into my system.

I try hard to ignore it. Most of the time I can but there are times that I get frustrated by the occurrence when nothing really seems to be bugging me.

Bud

I'm not a doctor but I wouldn't worry that its doing your heart damage.

I get this randomly for no apparent reason also. For me, its as others suggested - adrenaline running away with me when some misfired chemical reaction is set off in my brain.

I hate the fight/flight reaction, it sends me into a terribly irrational frenzy.

I have a similar problem with the heart sensations. Sometimes exercise makes it worse, sometimes better. I believe it is something to do with the fight/flight reaction being overly sensitive. I have to just do some deep breathing, calm myself down, and lay low for an hour maybe.

I had the worst bout of this when someone told me some very hard news a couple days ago. My heart felt like it was going to explode right then and there. I knew it was just myself being overwhelmed and my body not reacting as it should. My chest was sore and my heart was beating heavy the next few days, but going for a run seemed to help stop the adrenaline rush in the days after.

Hello guys, please research about POTS as well as other forms of dysautonomia and see a doctor to rule them out. Some people develop a form of dysautonomia after a concussion. See my other thread: http://www.neurotalk.org/traumatic-brain-injury-and-post-concussion-syndrome/222365-experience-dizziness-pots.html?highlight=POTS