It happens to me, too. Sometimes I feel hot all over like I'm having a hot flash. Sometimes it's just my feet. My feet feel really hot. It's sort of like the feeling when you take niacin but not as strong and it happens often after I eat but sometimes just randomly during the day. It started when I first started changing my diet. I started by eating sweet potatoes with cheese for lunch instead of sandwiches. I would be burning up not just after I ate that but at random times during the day. Then I just went regular low carb high fat primal and ate different things and same thing: random episodes of feeling hot. Especially after breakfast which for me is heavy on pastured eggs, heavy cream in my coffee and sometimes meat or liver.
I'm curious about this flushing due to insulin sensitivity mentioned above. I haven't heard of that before. I'm insulin resistant, hence the low carb.
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
Starting squat: 45lbs. Highest squat: 167.5 x 2. Current Deadlift: 190 x 3