BLAIN, among farriers, a distemper incident to beasts, being a certain bladder growing on the root of the tongue, against the windpipe, which swells to such a pitch as to stop the breath. It comes by great chaffing and heating of the stomach, and is perceived by the beast's gaping and holding out his tongue, and foaming at the mouth. To cure it, cast the beast, take forth his tongue, and then, flitting the bladder, wash it gently with vinegar and a little salt.