The Compendium of Caraka 3.5.8_1

3.5.8_1

udakavahānāṃ srotasāṃ tālumūlaṃ kloma ca, praduṣṭānāṃ tu khalveṣāmidaṃ viśeṣavijñānaṃ bhavati; tadyathā---jihvātālvoṣṭhakaṇṭhaklomaśoṣaṃ pipāsāṃ cātipravṛddhāṃ dṛṣṭvodakavahānyasya srotāṃsi praduṣṭānīti vidyāt/

The palate and the kloma are the root of the channels carrying water, and when these are vitiated, this is their specific diagnostic knowledge; namely: seeing dryness of the tongue, palate, lips, throat, and kloma, and excessive thirst, one should know that his channels carrying water are vitiated.