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.