This study is a randomized controlled trial that compares 30 patients with primary dysmenorrhea by assigning them in a 1:1 ratio between patients treated with a Chuna therapy strategy and patients treated with a strategy using physical therapy. The purpose of the study is to confirm the comparative effectiveness of Chuna therapy and physical therapy.

Menstrual pain is known to be caused by increased tension in the uterine muscles and irregular contractions, and is experienced by 50% of women who menstruate. However, most people control pain with NSAIDs or hormones. Among non-pharmacological treatments, manual therapy is known to control menstrual pain by influencing pain perception and pain-related serological factors. Previous research results have shown that manual therapy using sacroiliac joint correction and high-speed, low-amplitude thrust techniques is effective for menstrual pain. However, there is still no randomized controlled study limited to Chuna therapy. Therefore, the investigators would like to conduct a randomized clinical study to determine the effectiveness and safety of Chuna therapy for primary dysmenorrhea.

Inclusion Criteria:

• Patients whose menstrual pain is NRS 5 or higher during the last 3 months due to primary dysmenorrhea
• Patients who are between 14 and 49 years of age
• Patients whose cycle has been regular between 21 and 40 days for the past 3 months
• Patients who agree to participate in clinical research and provide written test subject consent

Exclusion Criteria:

• Patients whose cause of menstrual pain is determined to be an organic problem (uterine fibroids, adenomyosis, endometriosis, etc.) rather than a primary cause.
• Patients who have taken oral contraceptives or other hormonal therapy within the past 3 months.
• Patients diagnosed with other chronic diseases (stroke, myocardial infarction, kidney disease, diabetic neuropathy, dementia, epilepsy, etc.) that may interfere with the treatment effect or interpretation of results.
• Patients who are currently taking steroids, immunosuppressants, drugs for mental illness, or other drugs that may affect the results of the study.
• Patients for whom manual therapy is inappropriate or unsafe: history of lumbar fusion or pelvic girdle surgery, spinal fracture, or severe instability.
• Pregnant women, those planning to become pregnant within 6 months, and those planning to take hormones such as oral contraceptives.
• Patients who finished participating in another clinical study less than 1 month ago, or who plan to participate in another clinical study during the study participation and follow-up period within 6 months from the date of selection.
• Patients who find it difficult to fill out the consent form for research participation.
• Other cases where participation in clinical research is deemed difficult by the researcher.