“…In small open prospective trials, it has been demonstrated that NB UVB is probably effective in diseases such as lichen planus, seborrheic dermatitis, and pruritus associated with polycythemia vera. Although itch appears to be one of the most responsive subjective symptoms to NB UVB, 12,31,33,35 there is a lack of well-designed studies on patients with pruritus associated with systemic diseases, in particular comparing BB UVB with NB UVB. Possibly NB UVB is also an effective, in particular potentially itch-reducing, therapeutic option for patients with chronic urticaria or acquired perforating dermatosis.…”