Charak Samhita
शुष्कौ प्रक्षाल्य निर्दुह्यात्तथा स्तन्यं विशुध्यति । फेनसङ्घातवत्क्षीरं यस्यास्तां पाययेत् स्त्रियम् ॥२६५॥
it should be washed with warm water and milk to be expressed from the breast. Thus the affected milk gets purified. The woman whose milk gets frothy,
english translation
zuSkau prakSAlya nirduhyAttathA stanyaM vizudhyati । phenasaGghAtavatkSIraM yasyAstAM pAyayet striyam ॥265॥
hk transliteration by Sanscript