I am a 27yo male, weigh around 85 kg. In the last week or so I have noticed that when I am resting I can feel that my pulse is strong. I can't feel it when I put my hand on my chest, it doesn't make my chest rise, I can just feel it inside me. When I stop and stand still, I can usually feel it if I focus on it, but I don't seem to feel it if I am on the move. As far as I am aware, you are not supposed to be aware of your heart beat when resting. I have a resting heart rate of around 60bpm, even when I can feel my heart beat, and had my blood pressure taken last week and it was 120/60, which the doctor said was good. I have for the last few years or so drank more or less every weekend, pretty heavily, but have stopped completely 3 weeks ago. Is it possible I have messed up my body chemistry and my body is now trying to get used to the change? I thought it may have been due to lack of sleep/ sleep disruptions, but the last few nights i've had at least 8 hours. I haven't had any caffeine since Saturday, i thought it may have been something to do with that but I still feel the strong pulse. I've been eating healthy, I run and workout more or less every day, although I haven't for the last couple days. I have been around people with the cold, is it possible this could be a symptom of me having the cold or a viral infection, even though I'm not displaying many other symptoms other than feeling slightly tired? Sometimes, i will just feel one or two strong beats and then it's normal again and I cant feel it, but as far as i'm aware when this happens, I don't skip a beat. Do you have any idea what could be causing me to experience this? I have been under a fair amount of stress recently and do get racing thoughts/anxiety to an extent but not with a fast heart beat. I have also been experiencing some other kind of chest discomfort in that there can be a slight pain on the left side of my chest, which I can normally pinpoint, lasts for no more than a few seconds, and I think it changes with movement. I can bring it on with tensing my chest, I put it down before to working out but I am wondering if it could be related. I've been told that pain in the chest that lasts only a second or two is not related to heart pain. Is this correct?