Indications

Spermatorrhea, impotence, irregular menstruation, genital dampness and itching, genital pain, hernia, difficult urination, medial knee and thigh pain, and leukorrhea.

Precise Location

In the posterior knee region, at the medial end of the popliteal crease, between the semitendinosus tendon and the semimembranosus tendon. With the knee slightly flexed, two tendons can be felt at the medial end of the popliteal crease – the point is in the depression between them.

Location Method

Sit upright or lie prone with the knee slightly flexed. At the medial end of the popliteal crease, two tendons (semitendinosus and semimembranosus) can be felt – the point is in the depression between them, where firm pressure produces a distinct sore and distending sensation.

Massage Method

① Massage: Press and knead with the thumb. ② Moxibustion: Apply mild-warm moxa stick. Press and knead Yingu with the thumb about 200 times, or for 3–5 minutes, to treat impotence and irregular menstruation. Therapeutic actions: Tonifies the kidney and regulates menstruation, benefits the kidney and secures essence, regulates the lower jiao, and clears heat and drains dampness.

Compatibility

Impotence: Combine with Guanyuan (RN-4) and Shenshu (BL-23). Irregular menstruation and leukorrhea: Combine with Guanyuan (RN-4), Sanyinjiao (SP-6), and Xuehai (SP-10). Spermatorrhea: Combine with Shenshu (BL-23), Zhishi (BL-52), and Taixi (KI-3). Difficult urination: Combine with Zhongji (RN-3), Sanyinjiao (SP-6), and Pangguangshu (BL-28). Medial knee and thigh pain: Combine with Xuehai (SP-10) and Yinlingquan (SP-9).

Efficacy & Actions

This point belongs to the Foot Shaoyin Kidney Meridian and is the He-Sea point where the meridian qi enters (corresponding to the Water element in the five-element theory). It tonifies the kidney and regulates menstruation, benefits the kidney and secures essence, regulates the lower jiao, and clears heat and drains dampness. It is a commonly used key point for treating male and female reproductive and urinary system disorders. First documented in Lingshu · Benshu. "Yin" refers to the medial side; "Gu" means valley or depression. Located in the depression on the medial side of the posterior knee, shaped like a valley – hence the name Yingu (Yin Valley).