She Gan means "arrow shaft." Again, not sure why. Perhaps the throat is like a shaft, and a deep sore throat feels like an arrow going down it. But the root doesn't look arrow shaft-y at all. It looks like little clouds made of wood or something.
She Gan is simple. It goes only to the lung, and is bitter and cold. Its main function is to transform phlegm. Looking at it, and the little circular wheels that appear on some of the root sections, I can see it moving around to transform phlegm. It clears the lungs when they have phlegm heat. Because it is so cold, it is cautioned / contraindicated in those with loose stools or who are pregnant.
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