Charak Samhita
विसर्पो न ह्यसंसृष्टो रक्तपित्तेन जायते । तस्मात् साधारणं सर्वमुक्तमेतच्चिकित्सितम् ॥१४२॥
Visarpa never occurs without the association of the rakta and pitta hence entirely general treatment has been described. It does not mean that line of treatment as per other dosha predominance is not explained here.
english translation
visarpo na hyasaMsRSTo raktapittena jAyate । tasmAt sAdhAraNaM sarvamuktametaccikitsitam ॥142॥
hk transliteration by Sanscript