lymphedema and severe itching

I have pretty bad lymphedema in my right leg. Last year I got cellulitus in my leg and was hospitalized for several days. I'm very watchful about infection. Problem is that my leg itches constantly. I had a dr. prescribe doxepin for itching and it helps some but also makes me sleepy. I've tried the eucerin lotion but it doesn't help at all. Anyone have any suggestions.