TB9 (Sìdú, “Sìdú”) is an acupuncture point on the Triple Burner Meridian. It is located on the posterior aspect of the forearm, 5 cun distal to the olecranon, in a depression between the radius and the ulna. It opens the portals of the ear, clears the throat, activates the channel and alleviates pain.
On the posterior aspect of the forearm, 5 cun distal to the olecranon, in a depression between the radius and the ulna.
Perpendicular insertion 0.5 to 1.2 cun.
Opens the portals of the ear, clears the throat, activates the channel and alleviates pain.
sudden deafness, deafness due to sudden qi blockage, toothache, lower toothache, dental caries pain, shortness of breath, sensation of a fleshy obstruction in the throat.
Sidu is a key distal point for acute conditions of the head and sense organs, particularly the ears and teeth. Its primary classical indication is for sudden deafness, emphasizing its ability to clear acute obstructions from the Shao Yang channel. It is also specifically noted for pain in the lower teeth and for sensations of blockage in the throat, making it a useful point for a range of ear, nose, and throat disorders.
Classical text; the translation was prepared with AI and is not clinical advice.
《類經圖翼》 Lèijīng Túyì — Illustrated Wings to the Classified Canon, Zhang Jiebin, 1624 · 卷七 · 經絡（五） · 手少陽三焦經穴 · Source: jicheng.tw ↗
四瀆 在肘前五寸外廉陷中。 刺六分，留七呼，灸三壯。 一曰刺三分。 主治暴氣耳聾，下齒齲痛According to this text, TB9 lies in the depression on the outer edge 5 cun in front of the elbow, needled 0.6 cun (another view: 0.3 cun), retained for 7 breaths, with 3 moxa cones; it was used for deafness from sudden qi and painful decay of the lower teeth.
《針方六集》 Zhēnfāng Liùjí — Six Collections on Needling, Wu Kun, 1618 · 卷之一·神照集 · 手少陽三焦經圖穴十七 · 手少陽三焦經所發二十三穴 · Source: jicheng.tw ↗
四瀆二穴，在肘前五寸外廉陷者中。 《針經》刺入六分，留七呼，灸五壯According to this text, TB9 lies in the depression on the outer edge 5 cun in front of the elbow; the Zhenjing gives needling of 0.6 cun, retained for 7 breaths, with 5 moxa cones.
TB9 is one of 23 points on the Triple Burner Meridian. Nearby points:
TB9 (Sìdú) is located on the posterior aspect of the forearm, 5 cun distal to the olecranon, in a depression between the radius and the ulna.
TB9 opens the portals of the ear, clears the throat, activates the channel and alleviates pain. Common clinical indications include sudden deafness, deafness due to sudden qi blockage, toothache, lower toothache, dental caries pain, shortness of breath, sensation of a fleshy obstruction in the throat.
Perpendicular insertion 0.5 to 1.2 cun.
TB9 is a point on the Triple Burner Meridian (Sān Jiāo).