I'm 9 days post-op & I too have had a few of these "hot flashes." it definitely happens if I drink my 11 ounce protein drink too fast! At first I would even have a headache with it!
I'm day six today! I truly believe its "emotionally attached to food." I have same attachment I'm normally super busy, but now that I'm home, I'm watching T.V and BOY do they advertise FOOD! Hope GOD helps us! Good Luck!