Ashtangasamgraha 22.17

22.17

The wise one, however, who is constantly diligent, having examined everything in every way,
never stumbles, even on an uneven path of therapeutic action.
After a fortnight, this should be drunk by the patient with leukoderma, and the procedure prescribed for skin diseases should be performed for him;
and one should foment him;
likewise nasal drops of milk and ghee, and anointing of the head;
if there is still no relief even so, then purgation again.