Most common explanation are demodex mites, but I haven’t experienced this. I’ve noticed it’s a hyper-immunity kind of disorder (but not disorder) where the skin barrier getss inflamed when the slightest bit of a trigger touches it or a response happens within the body. For example, when eating spicy foods my face will flush (same with everyone), however, if I have spicy foods and something that is a trigger to my face (for example lotion, which doesn’t inflame it when putting it on), the synergistic effect of the 2 causes my face to feel like fire. The solution is to protect the skin barrier, hence applying a light oil like Rosehip seed oil. Inflammation fighters like chamomile help.