The Compendium of Caraka 6.7.59

6.7.59

sarpīṃṣi tiktakāni ca &yaccānyadraktapittanut karma/
bāhyābhyantaramagryaṃ tat kāryaṃ pittakuṣṭheṣu//
&`yaccoktaṃ' iti pā-.
doṣādhikyavibhāgādityetat karma kuṣṭhanut proktam/
vakṣyāmi kuṣṭhaśamanaṃ prāyastvagdoṣasāmānyāt//

Bitter ghees and whatever other measure destroys rakta-pitta, / external and internal, of highest excellence, should be done in pitta-kuṣṭhas. / Thus this action destroying kuṣṭha has been declared according to the division of doṣa excess; / I shall now describe the pacification of kuṣṭha in general due to the commonality of skin morbidity.