DU28 (Yinjiao, “Yinjiao”) is an acupuncture point on the Governing Vessel Meridian. It is located on the inside of the upper lip, at the junction of the frenulum and the upper gum. It clears heat, resolves swelling, calms the spirit, and benefits the eyes, nose, and gums.
On the inside of the upper lip, at the junction of the frenulum and the upper gum.
Perpendicular or oblique-superior insertion 0.1-0.2 cun. Bleeding the point is also common.
Clears heat, resolves swelling, calms the spirit, and benefits the eyes, nose, and gums.
Lockjaw (trismus), pulling sensation in the nose, tearing with copious eye discharge, redness, pain, and itching of the inner canthus, white superficial visual obstruction (pterygium/cataract), facial redness with vexation and heart pain, nasal congestion, nasal polyps, nasal sores, erosive sores in the nose, pain in the nasal bridge and forehead, mouth cannot be held closed, mouth sores, epilepsy with mutual pulling, tetanic inversion, vexation and fullness, toothache, gingival pain, lip and mouth stiffness.
Yinjiao is the terminal point of the Governing Vessel and a key meeting point with the Conception and Stomach channels, making it significant for conditions of the face, mouth, nose, and eyes. It is particularly effective for acute lumbar sprain, where pricking the point to bleed can provide immediate relief. Clinically, it is also a primary local point for gum swelling, mouth sores, and nasal polyps, often treated by pricking or shallow needling.
Classical text; the translation was prepared with AI and is not clinical advice.
《醫學綱目·刺灸》 Yīxué Gāngmù · Cìjiǔ — Outline of Medicine: Needling and Moxibustion, Lou Ying, 1565 · 卷之八·陰陽臟腑部 · 穴法下 · Source: jicheng.tw ↗
齦交一穴，在唇內齒上斷縫中，任督足陽明之會。 針入三分，灸三壯。According to this text, DU28 lies inside the lip in the seam of the gum above the teeth, a meeting point of the conception and governor vessels and foot yangming; needle insertion is 0.3 cun with 3 moxa cones.
《針灸資生經》 Zhēnjiǔ Zīshēng Jīng — Classic of Nourishing Life with Acupuncture & Moxibustion, 1220 · Source: Wikisource ↗
水溝、齦交、主口不能禁水漿The text records that DU26 and DU28 were used for inability to hold liquids in the mouth.
《針灸甲乙經》 Zhēnjiǔ Jiǎyǐ Jīng — Systematic Classic of Acupuncture & Moxibustion, c. 256–282 · 卷03 · Source: Wikisource ↗
齦交，在唇內齒上齦縫中，刺入三分，灸三壯According to this text, DU28 lies inside the lip in the seam of the gum above the teeth; needling is 0.3 cun with 3 moxa cones.
《針方六集》 Zhēnfāng Liùjí — Six Collections on Needling, Wu Kun, 1618 · 卷之五·紛署集 · 面部凡三十九穴第十 · Source: jicheng.tw ↗
齦交一穴，主額中痛，頸項強不能回顧，目淚眵汁，內眥赤，癢痛生白翳，鼻中息肉，蝕瘡，窒塞不利，面赤心煩The text records that DU28 was used for pain in the middle of the forehead, stiff neck with inability to turn, watery and sticky eye discharge, red, itchy and painful inner canthus with white screens, nasal polyps, eroding sores, nasal obstruction, and red face with vexation.
DU28 is one of 28 points on the Governing Vessel Meridian. Nearby points:
DU28 (Yinjiao) is located on the inside of the upper lip, at the junction of the frenulum and the upper gum.
DU28 clears heat, resolves swelling, calms the spirit, and benefits the eyes, nose, and gums. Common clinical indications include lockjaw (trismus), pulling sensation in the nose, tearing with copious eye discharge, redness, pain, and itching of the inner canthus, white superficial visual obstruction (pterygium/cataract), facial redness with vexation and heart pain, nasal congestion, nasal polyps, nasal sores, erosive sores in the nose, pain in the nasal bridge and forehead, mouth cannot be held closed, mouth sores, epilepsy with mutual pulling, tetanic inversion, vexation and fullness, toothache, gingival pain, lip and mouth stiffness.
Perpendicular or oblique-superior insertion 0.1-0.2 cun. Bleeding the point is also common.
DU28 is a point on the Governing Vessel Meridian (Dū Mài).