Affliction treated in newborns with phototherapy (8)
I believe the answer is:
jaundice
(Other definitions for jaundice that I've seen before include "It causes yellowing of the skin" , "Disease - sour and prejudiced viewpoint" , "Yellowing of the skin and whites of the eyes" , "Disease causing yellowing of the skin - bitterness" , "Illness; resentment" .)