Delivered coprogram, everything is ok except for starch, showed ++. Co…

Delivered coprogram, everything is ok except for starch, showed ++. Could it be dermatitis? I've seen many doctors, treatment helps while you treat, go through a course and everything starts over again... the doctor said eat less starch products for me and my child. I don't even eat anything like that, the child only eats rice porridge... could anyone have encountered something similar? I would be glad for your stories on how they coped ?