Effect of Bagua Auriculotherapy on Pain in Patients Undergoing Hysteroscopy

Inclusion Criteria: * Aged 20 to 45 years * Female * Scheduled for diagnostic hysteroscopy * American Society of Anesthesiologists (ASA) Physical Status Classification I or II * Normal comprehension and communication skills, able to complete Numerical Rating Scale (NRS) and Self-Rating Anxiety Scale (SAS) assessments * Willing to provide written informed consent Exclusion Criteria: * Known allergy to auricular plaster or Vaccaria segetalis (Wang Bu Liu Xing) seeds * Active lesions on the ear, such as wounds, ulcers, swelling, or deformity * Severe psychiatric or neurological disorders * Severe cardiovascular or cerebrovascular diseases * Pre-existing significant pain, nausea, vomiting, dizziness, or tinnitus before the procedure