I wanted to let you know that i took aromasin for just 2 or 3 months and had a similar situation.
The itching was unbearable & even kept me up at night. In addition i had diarrhea for 4 weeks. I had some blood work done and it turned out that my liver functions were all very high.
Apparently this was caused by the aromasin because i stopped taking it about 4 weeks ago and everything is almost back to normal and most importantly the itching and diarrhea are gone.
Good luck to you
Eve