How worried should i be when told my mum has jaundice but that's all she knows and she needs more blood tests. should i be worried?

Jaundice: Yellow discoloration of the skin and eyes is a consequence of elevation in the blood of a substance called bilirubin. It can increase due to blocked bile ducts from gallstones, strictures, infection, tumor. Jaundice can also occur from liver infection like hepatitis, or other liver diseases that destroy the liver cells. Tumors of the liver, bile system, or pancreas can also raise the bilirubin.