What is the treatment for discoid lupus erythematosus?

Less sun, some Rx: Sun protection, topical steroids, avoidance of any drug which may have provoked the dle. If no better in 2-4 weeks, cortisone injections into the lesions or topical calcineurin inhibitors. If still no better in 2-4 more weeks, oral hydroxychloroquine, an anti-malarial medication. There are even further treatment for refractory cases but the above usually works.