What Should We Do About Our Newborn Baby S Persistent Jaundice And Bilirubin Levels, Despite Phototherapy?

Hello Dr My baby ,26 days ,O+ ve,.. after 48 hours the bilirubin level was 14..AFter phototherapy for one day it becomes 9. 18 days older- bilirubin level was 12. There was a yellowish colour in the eyes ..still there is a yellow shade in the corner of eyes.what we hve to do..please reply