I was diagnosed with lichen sclerosis in 2010 in the genital. it's back now and worse than ever. blister, cuts, itchy. what can i use now to stop itch?

Topical steroids: Assuming the diagnosis is correct and under supervision of your physician topical corticosteroid preparations are the main stay of treatment for genital lichen sclerosus. Improvement is common if the more potent topical steroids are used (e.g. Betamethasone diproprionate 0.05% or clobetasol proprionate 0.05% cream or ointment) 1-2x/day for for 4-6 weeks, then tapered.

Hydrocortisone: Possibly the recommendation will again be the Hydrocortisone cream but perhaps for a longer but spaced out time. See your doctor again to be sure. I hope it goes well, try not to worry it seems to be not too unusual. Here's a link: http://www.Medicinenet.Com/lichen_sclerosus/article.Htm.