anyone else hot after eating?

Lately I have been getting very hot after eating.  I've been trying to eat a little more since I am at my goal weight and am in the middle of an 8 day bicycle tour. We're riding anywhere from 40 to 70 miles a day and I feel like I need to eat more to fuel my ride. I wonder if increasing my meal size is causing me to have hot flashes or if it is something else. Anyone have suggestions? 

It could be a blood sugar issue, especially if the extra food you've been eating is carb-heavy. If I eat too many carbs I get this reaction. 

This happens to me almost every time I eat! I mentioned it to my dr and she thought it might be because I ate too fast. 

I have had that before and its usually when I eat too fast.