Hi welcome to the health care magic You have been treated for acute appendicitis by appendisectomy operation... Your doctor is doing investigation in right way... Although you are improving (bilirubin level reducing), cause for elevated bilirubin should be searched by peripheral smear examination, USG abdomen, PT, APTT, sgpt, sgot etc . . If specific cause found than treated accordingly... Appendisectomy operation is not here probably cause for elevated bilirubin.. Sugar cane juice, carrots, green leafy vegetables, lemon juice, coconut water will be beneficial Take care Consult physician for examination with keeping all this in mind Hope your concern solved