SP4 (Gōngsūn, “Gōngsūn”) is the Luo-Connecting point point of the Spleen Channel Meridian. It is located on the medial aspect of the foot, in the depression distal and inferior to the base of the first metatarsal bone, at the junction of the red and white skin, 1 cun posterior to the metatarsophalangeal joint of the great toe. It regulates the Spleen and Stomach, harmonizes the Middle Jiao, resolves dampness, calms the spirit, and regulates the Chong Mai (Penetrating Vessel).
On the medial aspect of the foot, in the depression distal and inferior to the base of the first metatarsal bone, at the junction of the red and white skin, 1 cun posterior to the metatarsophalangeal joint of the great toe.
Perpendicular insertion, 0.6 to 1.2 cun.
Regulates the Spleen and Stomach, harmonizes the Middle Jiao, resolves dampness, calms the spirit, and regulates the Chong Mai (Penetrating Vessel).
Abdominal distention, borborygmus, abdominal pain, cutting pain in the intestines, cholera, vomiting, poor appetite, indigestion, drum-like abdominal distention, mania, vexation of the heart, excessive thirst, insomnia, head and face swelling, heart pain, phlegm and drool obstruction, pain in the chest, pain in the hypochondriac region, postpartum blood dizziness, bloody stools from intestinal wind, anal prolapse, qi obstruction, food stagnation, accumulation lumps, infantile food accumulation, infantile diarrhea, malaria with heart pain, stomach cold, spleen cold.
As the Luo-connecting point of the Spleen and the confluent point of the Chong Mai, Gongsun is a primary point for disorders of the digestive system and their connection to the Heart and chest. It is classically indicated for both excess conditions like acute abdominal pain and cholera, and deficiency conditions like bloating and poor appetite. Its connection to the Chong Mai makes it essential for treating gynecological issues and harmonizing rebellious Qi that affects the chest and heart, often paired with PC6 (Neiguan) for this purpose.
Classical text; the translation was prepared with AI and is not clinical advice.
《針灸甲乙經》 Zhēnjiǔ Jiǎyǐ Jīng — Systematic Classic of Acupuncture & Moxibustion, c. 256–282 · 卷11 · Source: Wikisource ↗
凡好太息，不嗜食，多寒熱，汗出，病至則善嘔，嘔已乃衰，即取公孫及井俞The text records that for frequent sighing, poor appetite, much cold and heat with sweating, and attacks with vomiting that ease after vomiting, one takes SP4 together with the jing-well and shu-stream points.
《針經指南》 Zhēnjīng Zhǐnán — Guide to the Needling Classic, Dou Hanqing, 1295 · 定八穴所在 · Source: jicheng.tw ↗
公孫二穴，足太陰脾之經。 在足大趾內側本節後，一寸陷中。 令病人坐蜷兩足底，相對取之According to this text, SP4 on the foot Taiyin spleen channel lies on the inner side of the big toe, in the depression 1 cun behind the joint; the patient sits with the soles of both feet facing each other to locate it.
《備急千金要方》 Bèijí Qiānjīn Yàofāng — Essential Prescriptions Worth a Thousand Gold for Emergencies, c. 650 · 第二 · Source: Wikisource ↗
妊娠五月，足太陰脈養，不可針灸其經（如隱白、大都、公孫、商邱、The text states that in the fifth month of pregnancy the foot Taiyin vessel nourishes the fetus, so its points, such as Yinbai, Dadu, SP4 and Shangqiu, must not be needled or moxibusted.
《神灸經綸》 Shénjiǔ Jīnglún — Principles of Divine Moxibustion, Wu Yiding, 1851 · 卷之二 · 十二經脈起止 · 脾經二十一穴分寸 · Source: jicheng.tw ↗
公孫 從太白上行足大指本節後一寸內踝前陷中灸三壯According to this text, SP4 lies above Taibai (SP3), 1 cun behind the joint of the big toe, in the depression in front of the inner ankle; moxibustion 3 cones.
SP4 is one of 21 points on the Spleen Channel Meridian. Nearby points:
SP4 (Gōngsūn) is located on the medial aspect of the foot, in the depression distal and inferior to the base of the first metatarsal bone, at the junction of the red and white skin, 1 cun posterior to the metatarsophalangeal joint of the great toe.
SP4 regulates the Spleen and Stomach, harmonizes the Middle Jiao, resolves dampness, calms the spirit, and regulates the Chong Mai (Penetrating Vessel). Common clinical indications include abdominal distention, borborygmus, abdominal pain, cutting pain in the intestines, cholera, vomiting, poor appetite, indigestion, drum-like abdominal distention, mania, vexation of the heart, excessive thirst, insomnia, head and face swelling, heart pain, phlegm and drool obstruction, pain in the chest, pain in the hypochondriac region, postpartum blood dizziness, bloody stools from intestinal wind, anal prolapse, qi obstruction, food stagnation, accumulation lumps, infantile food accumulation, infantile diarrhea, malaria with heart pain, stomach cold, spleen cold.
Perpendicular insertion, 0.6 to 1.2 cun.
SP4 is a point on the Spleen Channel Meridian (Zú Tài Yīn Pí Jīng).