This study is a multi-center, randomized, double-blinded, controlled trial with two parallel arms. The study aims to evaluate the efficacy and safety of Involucrata Liquid Tonic in patients with Postpartum Rheumatism.

Inclusion Criteria:

• Women experience joint and muscle pain, soreness, heaviness, numbness, etc. within 1 year after childbirth, miscarriage or induction of labor; with or without sensitivity to external stimuli such as wind, cold, moisture, etc., which may be induced or aggravated by emotional fluctuations
• Meets the diagnostic criteria for Yang Qi deficiency and cold-dampness syndrome.
• Age 18-50
• Pain VAS score ≥4cm

Exclusion Criteria:

• Those in the puerperium (within 42 days after delivery).
• Those who have rheumatoid arthritis, ankylosing spondylitis, osteitis density, polymyalgia rheumatica, reactive arthritis, myofasciitis, fibromyalgia syndrome and other rheumatic immune diseases before pregnancy.
• Severe abnormalities in blood routine and electrocardiogram, active liver disease or abnormal liver function, AST, ALT or GGT higher than 1.2 times the upper limit of normal value; abnormal renal function, serum creatinine (sCr) higher than 1.2 times the upper limit of normal value. Patients whose white blood cell count < 3.0×109/L, or hemoglobin < 90 g/L, or platelet count < 100.0×109/L in routine blood examination
• Combined with serious underlying diseases, primary diseases and postpartum diseases, such as uncontrollable hypertension, heart disease, kidney disease, puerperal fever, mastitis, moderate to severe postpartum depression diagnosed by a psychiatric department, etc.
• Those who have a history of using glucocorticoids, immunosuppressants and other drugs within 4 weeks.
• Those who are allergic to the ingredients of the test drug or have a high-sensitivity constitution.
• Existing or past history of cancer.
• Those who have participated in other clinical drug studies in the past 2 months.
• Those who do not use the medication as prescribed, or who have incomplete information that affects the judgment of efficacy.