Elevated bile salts in system aka high billy rubin

Has anyone every experienced scratching with our kids. About 4 years ago spencer was scratching, we went to GI, had blood work done, and he had a lot of salt in his system from the bile his system properly. At that time, We did an ultrasound, but thanks gosh everything came back normal. He was on the meds about a year and then his levels returned to normal. He’s back to scratching again and his blood work show elevated bile salts, again, that’s why he’s scratching. we are going to have an ultrasound of his liver and spleen. I was just wondering if anyone else had any issues related to liver. Any advice?
Corey Leibowitz