Psoriasis is a common, chronic, inflammatory, benign hyper- proliferation disease. It is stubborn ,recurrent and hard to treat. There have not perfect treatment on psoriasis up to now. Recently, Some traditional herb Chinese medicine has been well used on treatment of psoriasis for a long time in our country , though their treatment mechanism has not been known clearly till now. Cooling blood and activating blood circulation formula which integrated traditional Chinese medical theories and experiment...