I don't know why I get this, but when I do breath concentration I always have an uncomfortable feeling on my throat/neck on exhalations. It's not painful, it's just uncomfortable and I keep on having to adjust my jumper or t shirt, if my neck is bare at all I don't like it. I'm starting to get a bit OCD about it. It's interrupting my practice quite a bit.
"The original heart/mind shines like pure, clear water with the sweetest taste. But if the heart is pure, is our practice over? No, we must not cling even to this purity. We must go beyond all duality, all concepts, all bad, all good, all pure, all impure. We must go beyond self and nonself, beyond birth and death. When we see with the eye of wisdom, we know that the true Buddha is timeless, unborn, unrelated to any body, any history, any image. Buddha is the ground of all being, the realization of the truth of the unmoving mind.” Ajahn Chah