Posted 6/6/2013 1:45 PM (GMT 0)
I've also had this symptom on occasion. Never able to find a pattern to it. Some say that it means you're allergic to, or intolerant of, a food you're eating, and that your immune system is kicking into gear. I track everything I eat, and was never able to find a pattern to it, so I have good reason to doubt that theory.
Yes, i think a small increase to your heart rate is normal. But, like you're I've experienced times where my heart turns into a super-thumper, and I get flushed and anxious. Sure wish someone would figure it out and publish a paper.