Hello!
Thank you for the query.
His
severe itching is caused by jaundice. Due to bile ducts obstruction or
liver failure bilirubin accumulates in the body including skin. This causes yellow skin (not always visible), itching, dark urine, stools can be white.
He should visit his doctor, have abdominal
ultrasound, blood work, bilirubin level, liver tests (AST,ALT,AP,GGTP) and amylase. In case of elevated liver tests, ERCP and stent to bile ducts should be placed.
Hope this will help.
Regards.