Item when an imposthume of the side434 turns to one of the lungs, or frenzy to lethargy it is bad; but it is less harmful if it be an imposthume of the lungs that turns to one of the side, or lethargy to frenzy —as Avicenna says. He says also, when the matter goes from a noble member to an ignoble member, that it is a good sign; but when it goes from an ignoble member to a noble member, or to a member that cannot digest it properly, it is a bad sign. Note, fever and trembling, come often when the pus is formed, because of the matter breaking and burning the skin.435