Ying-spring (fire) point.

bubble_chart Etymology

"Da" (大), big; "Du" (都), metropolis. The acupoint is located at the prominence of the base of big toe, hence the name.

bubble_chart Location

Dadu (SP2) acupoint
(adapted from "Meridians and Acupoints")

• Lingshu‧Benshu: "In the depression posterior to the base joint"; Yixue Gangmu suggests that the "posterior" might be a mistake and should be "anterior".
• Zhouzhou Beiji Fang: "On the medial side of the base of big toe, 1 cun at the junction of the red and white flesh";
• Zhenjiu Jicheng: "On the medial side of big toe, in the depression at the junction of the red and white flesh, anterior to the second segment and posterior to the base joint, in the bone crevice."

bubble_chart Anatomy

• Muscle: insertion point of abductor thumb muscle.
• Nerve: the proper plantar nerve of medial plantar nerve.
• Vessel: branch of medial plantar artery.

bubble_chart Manipulation

Insert perpendicularly 0.3～0.5 cun.

bubble_chart Efficacy

Fortify spleen, resolve dampness, stop diarrhea.

• Classical: febrile disease with absence of sweating and cold extremities, cold hands and feet, sudden diarrhea, abdominal distension and chest fullness, stomach and heart pain, indigestion, vomiting, difficulty in defecation, various types of diarrhea, lumbago, body heaviness and bone pain, malaria with unclear symptoms, wind inversion, sudden swelling of the limbs, chills due to dampness, vexation when hungry, dizziness when full, sudden stroke.

bubble_chart Combinations

• Stomach and heart pain: Dadu (SP2), Taibai (SP3).
• Various types of diarrhea: Dadu (SP2), Shangqiu (SP5), Yinlingquan (SP9).
• Febrile disease with absence of sweating: Dadu (SP2), Jingqu (LU8).
• Sudden diarrhea: Dadu (SP2), Kunlun (BL60), Qimen (LR14), Yinlingquan (SP9), Zhongwan (CV12).