Acupuncture
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EX-UE-2
Needle Depth
0.5–1.0 cun
Needle Angle
90° (Perpendicular), 45° (Oblique)
Body Area
Forearm
Location
A pair of points on the palmar aspect of the forearm, 4 cun proximal to the wrist joint space (most distal wrist crease), on either side of the tendon of the flexor carpi radialis muscle.
Main Actions
- Treat haemorrhoids and rectum prolapse
Indications
Commentary
Erbai Ex-UE-2 has a long history in treating haemorrhoids and rectum prolapse.
Classical Sources
《扁鹊神应针灸玉龙经》(Bian Que Shen Ying Zhen Jiu Yu Long Jing - Bian Que's Miraculous Response Jade Dragon Classic of Acupuncture): Describes Erbai as being located 4 cun above the palmar wrist crease, with two points paired together—one between the tendons and one outside the large tendon. Indicated for hemorrhoidal disorders with tenesmus, itching, pain, or bleeding. Recommends 14 cones of moxibustion.
《医学纲目》(Yi Xue Gang Mu - Medical Compendium): Records Erbai for treating hemorrhoidal bleeding, tenesmus (urgency with incomplete evacuation), and anal itching or pain. Located on the Hand Jueyin region, two points paired together.
《针灸大成》(Zhen Jiu Da Cheng - Great Comperta of Acupuncture and Moxibustion): Lists Erbai as four points, comparing location to Ximen PC-4 area, 4 cun above the palmar wrist crease, one point between two tendons (similar to 1 cun posterior to Jianshi PC-5), and one point lateral to it. Primary indication: hemorrhoids and rectal prolapse.
How to Locate
Place the patient’s arm in a relaxed supinated position. From the center of the wrist joint space, measure 4 cun in a proximal direction and, on this level, locate one of the points lateral to and the other point medial to the tendon of the flexor carpi radialis muscle. Or: Divide the distance between the cubital crease and the wrist joint space into thirds, then locate Erbai Ex-UE-2 one third of the distance from the wrist joint.
Caution
This is a paired point—there are actually two points per arm (four points total for both arms), located on either side of the flexor carpi radialis tendon. The radial point is closer to the Lung channel, while the ulnar point lies near deeper structures including the median nerve. Avoid needling too deeply on the ulnar side to prevent nerve irritation. Some classical texts advise using reducing technique and cautioning about moxibustion in certain presentations.
Needle Angle
90° (Perpendicular) / 45° (Oblique)
Depth Category
Medium
Standard Depth
0.5–1.0 cun
Needling Directions
Up to 1 cun vertically or up to 1.5 cun obliquely towards proximal.
Expected Deqi Sensation
Local soreness and distension at the needling site, sometimes radiating proximally or distally along the forearm. The deqi sensation is typically a dull, achy feeling around the flexor tendons.
Moxibustion
Recommended
Duration: 5–10 minutes with moxa stick; or 3–7 cones
Cupping
N/A
Bloodletting
N/A
Gua Sha
Questionable
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