The Compendium of Bheḷa 4.7.1

4.7.1

iha khalu śarīre ṣaṭ tvaco bhavanti | udakadharā prathamā ' sṛgdharā dvitīyā,sidhmakilāsasaṃbhava[maṃ] adhiṣṭhānā tṛtīyā, dadrukuṣṭhasambhavādhiṣṭhānā caturthī, alajīvidridhisambhavādhiṣṭhānā pañcamī, ṣaṣṭhī tu yasyāṃ chinnāyāmuttāmyati timiramivānupraviśati duṣṭāruṣkāṇi cāsya yāmāśrity a jāyante iti ||

Here indeed, there are six layers of skin in the body. The first is the water-bearing; the second is the blood-bearing; the third is the seat of the arising of sidhma and kilāsa; the fourth is the seat of the arising of ringworm and kuṣṭha; the fifth is the seat of the arising of alajī and abscess; while the sixth is that which, when cut, causes one to faint and enter as if into darkness, and based on which malignant boils arise.