For anyone who experiences hot flashes when a panic attack is coming on, I stumbled upon a way to eliminate those sensations.
I usually get hot flashes up the back of my neck, across my chest, and on my forearms and thighs. To eliminate these, I found that slapping the area lightly and then immediately wiping the area (as if dusting yourself off), the sensations go away.
For myself, I found that doing away with the hot flashes reduced the effects of a panic attack or prevented it from continuing altogether.
Hope others find this helpful.