The aim of this study is to assess the efficacy and safety of Luo-Fu-Shan Plaster in patients with Rheumatoid Arthritis.

The investigators are inspired by Chinese traditonal herb, an therapy for thousands of years, and take its advantage to make Luo-Fu-Shan Plaster in order to get an effective and safe treatment for active RA patients. The study is a multicenter, randomized, double-blind, placebo-controlled trial.

Inclusion Criteria:

• Male or female subjects aged 18 to 75 years (time of get informed consent)
• Documented diagnosis of rheumatoid arthritis, as defined by the American Rheumatism Association 1987 Revised Criteria.
• Documented diagnosis of damp-heat syndrome according to Traditional Chinese Medicine.
• If patients are receiving Disease-modifying anti-rheumatic drugs (DMARDs), then the doses should have been kept stable for at least 12 weeks.
• If patients are receiving non-steroidal anti-inflammatory drugs (NSAIDs) or orally Chinese herbal medicine, then the doses should have been kept stable for at least 4 weeks.

Exclusion Criteria:

• Skin allergies or broken skin;
• Taking glucocorticoids,more than 10 mg daily.
• Female patients who are pregnant, breast-feeding or planed to be pregnant;