A Study on the Effects and Mechanisms of Non-invasive Acupoint Stimulation in Intervening in High Stress Sensitivity Among Young and Middle-aged Women With Qi Stagnation Constitution

Inclusion Criteria: * Female, aged 20-40 years. * Regular daily routine with relatively fixed wake-up and bedtimes, sufficient sleep (7-9 hours), regular diet, moderate physical activity, and avoidance of shift work. * Intact structure of major organ systems, with no active diseases or pathological damage. * Regular menstrual cycle (21-35 days) and normal menstrual period (3-7 days). * For the experimental group (Qi Yu constitution group): * Perceived Stress Scale (PSS-14) score ≥ 43. * Qi Yu Constitution Subscale score ≥ 40. * Diagnosis by a qualified TCM physician according to standard procedures, confirming characteristics of Qi Yu constitution, including (physical symptoms partially required): * Body type: Tending to be thin. * Psychological characteristics: Introverted, unstable, sensitive, suspicious, with significant emotional fluctuations. * Somatic symptoms: Fullness or migrating pain in the chest and hypochondrium, frequent sighing; sensation of a foreign body in the throat (globus hystericus); sleep disturbances (difficulty falling asleep, early awakening). Poor appetite, frequent belching. * Tongue and pulse: Pale red tongue with thin white coating, wiry and thin pulse. * For the control group (non-Qi Yu constitution group): * Perceived Stress Scale (PSS-14) score ≤ 42. * Qi Yu Constitution Subscale score \< 30. * No relevant clinical manifestations upon TCM examination. * Signed informed consent form, voluntarily participating in t…