There is a third class of diseases which may be conceived of as arising in three ways; for they are produced sometimes by wind, and sometimes by phlegm, and sometimes by bile. When the lung, which is the dispenser of the air to the body, is obstructed by rheums and its passages are not free, some of them not acting, while through others too much air enters, then the parts which are unrefreshed by air corrode, while in other parts the excess of air forcing its way through the veins distorts them and decomposing the body is enclosed in the midst of it and occupies the midriff thus numberless painful diseases are produced, accompanied by copious sweats. And oftentimes when the flesh is dissolved in the body, wind, generated within and unable to escape, is the source of quite as much pain as the air coming in from without; but the greatest pain is felt when the wind gets about the sinews and the veins of the shoulders, and swells them up, so twists back the great tendons and the sinews which are connected with them. These disorders are called tetanus and opisthotonus, by reason of the tension which accompanies them. The cure of them is difficult; relief is in most cases given by fever supervening. The white phlegm, though dangerous when detained within by reason of the air-bubbles, yet if it can communicate with the outside air, is less severe, and only discolours the body, generating leprous eruptions and similar diseases. When it is mingled with black bile and dispersed about the courses of the head, which are the divinest part of us, the attack if coming on in sleep, is not so severe; but when assailing those who are awake it is hard to be got rid of, and being an affection of a sacred part, is most justly called sacred. An acid and salt phlegm, again, is the source of all those diseases which take the form of catarrh, but they have many names because the places into which they flow are manifold.

Τρίτον δ΄ αὖ νοσημάτων εἶδος τριχῇ δεῖ διανοεῖσθαι [84d] γιγνόμενον͵ τὸ μὲν ὑπὸ πνεύματος͵ τὸ δὲ φλέγματος͵ τὸ δὲ χολῆς. ὅταν μὲν γὰρ ὁ τῶν πνευμάτων τῷ σώματι ταμίας πλεύμων μὴ καθαρὰς παρέχῃ τὰς διεξόδους ὑπὸ ῥευμάτων φραχθείς͵ ἔνθα μὲν οὐκ ἰόν͵ ἔνθα δὲ πλεῖον ἢ τὸ προσῆκον πνεῦμα εἰσιὸν τὰ μὲν οὐ τυγχάνοντα ἀναψυχῆς σήπει͵ τὰ δὲ τῶν φλεβῶν διαβιαζόμενον καὶ συνεπιστρέφον αὐτὰ τῆκόν τε τὸ σῶμα εἰς τὸ μέσον αὐτοῦ διάφραγμά τ΄ ἴσχον ἐναπολαμβάνεται͵ [84e] καὶ μυρία δὴ νοσήματα ἐκ τούτων ἀλγεινὰ μετὰ πλήθους ἱδρῶτος πολλάκις ἀπείργασται. πολλάκις δ΄ ἐν τῷ σώματι διακριθείσης σαρκὸς πνεῦμα ἐγγενόμενον καὶ ἀδυνατοῦν ἔξω πορευθῆναι τὰς αὐτὰς τοῖς ἐπεισεληλυθόσιν ὠδῖνας παρέσχεν͵ μεγίστας δέ͵ ὅταν περὶ τὰ νεῦρα καὶ τὰ ταύτῃ φλέβια περιστὰν καὶ ἀνοιδῆσαν τούς τε ἐπιτόνους καὶ τὰ συνεχῆ νεῦρα οὕτως εἰς τὸ ἐξόπισθεν κατατείνῃ τούτοις· ἃ δὴ καὶ ἀπ΄ αὐτοῦ τῆς συντονίας τοῦ παθήματος τὰ νοσήματα τέτανοί τε καὶ ὀπισθότονοι προσερρήθησαν. ὧν καὶ τὸ φάρμακον χαλεπόν· πυρετοὶ γὰρ οὖν δὴ τὰ τοιαῦτα ἐπιγιγνόμενοι μάλιστα λύουσιν. [85a] τὸ δὲ λευκὸν φλέγμα διὰ τὸ τῶν πομφολύγων πνεῦμα χαλεπὸν ἀποληφθέν͵ ἔξω δὲ τοῦ σώματος ἀναπνοὰς ἴσχον ἠπιώτερον μέν͵ καταποικίλλει δὲ τὸ σῶμα λεύκας ἀλφούς τε καὶ τὰ τούτων συγγενῆ νοσήματα ἀποτίκτον. μετὰ χολῆς δὲ μελαίνης κερασθὲν ἐπὶ τὰς περιόδους τε τὰς ἐν τῇ κεφαλῇ θειοτάτας οὔσας ἐπισκεδαννύμενον καὶ συνταράττον αὐτάς͵ καθ΄ ὕπνον μὲν ἰὸν πρᾳΰτερον͵ [85b] ἐγρηγορόσιν δὲ ἐπιτιθέμενον δυσαπαλλακτότερον· νόσημα δὲ ἱερᾶς ὂν φύσεως ἐνδικώτατα ἱερὸν λέγεται. φλέγμα δ΄ ὀξὺ καὶ ἁλμυρὸν πηγὴ πάντων νοσημάτων ὅσα γίγνεται καταρροϊκά· διὰ δὲ τοὺς τόπους εἰς οὓς ῥεῖ παντοδαποὺς ὄντας παντοῖα ὀνόματα εἴληφεν.