My mother has very bad HHT and as a result of AVM's throughout her liver she has now developed cirrhosis of the liver. One of the symptoms of liver disease is itching but I would assume that if you had liver disease you would know about it....nontheless....see a haematologist and ask to have a multitude of blood tests. Perhaps, also an immunologist to determine any allergies etc. For many many years I was itchy all over until I stopped using all products that contained sulfate. Sulfate is used as a foaming agent in shampoos, soaps, laundry detergent and it is highly irritating to the skin (look for names such as sodium laureth sulfate and sodium lauryl sulfate....try the process of elimination. I hope this may be of some help to you.