The Compendium of Caraka 3.7.20

3.7.20

yadi punarasyātipravṛddhāñchīrṣādān krimīn manyeta śirasyaivābhisarpataḥ kadācit, tataḥ svehasvedābhyāmasya śira upapādya virecayedapāmārgataṇḍulādinā śirovirecanena//

If, however, he should consider his head-eating worms to be excessively aggravated and occasionally crawling in the head itself, then, after preparing his head with oleation and sudation, he should purge it with head-cleansing medicines beginning with apāmārga seeds.