I guess it sucks on the "skin balloon" by creating low pressure around the lower body, thus "inflating" the legs (think swollen feet). But I'm a little surpris

I guess it sucks on the "skin balloon" by creating low pressure around the lower body, thus "inflating" the legs (think swollen feet). But I'm a little surprised that would work. Another way to look at it, would be that the higher pressure on the head and torso "squeezes" fluids down, like a water balloon - squeeze one end, and liquid goes to the other end?