Small Intestine
SI8
小海 · Xiaohai
Small Sea
Elbow groove point. Easy to overdo because of the nerve.
He-sea · Earth point of Small Intestine
Use caution
System
- Channel
- Small Intestine (SI)
- Element
- Fire
- Yin or yang
- yang
- Organ system
- Small Intestine
- Region
- Shoulder and arm
- Limb rule
- Hand Taiyang
Where it is
On the back of the elbow, in the groove between the olecranon and the inner bony knob, the “funny bone” groove.
Nearby: The ulnar nerve lives in this groove. Pressure that zings is too much.
Traditionally said to
He-sea and earth point of Small Intestine. Mostly a local elbow point in modern teaching, with older notes about shen and the channel.
What people look up
Acupressure
The lightest touch that still feels like contact, 20–30 seconds. Stop at the first electric feeling.
When not to press: If leaning on the elbow already zings, leave this point alone.
About 30–90 seconds is the usual window, unless the step above is shorter. Stop if pain, dizziness, or anything unusual shows up.
Licensed practice only
Needle depth, angle, electroacupuncture
Textbook language for students. Not instructions. A cun is a body-inch on that person, not a ruler inch. Do not needle yourself.
Depth
Common textbook range: about 0.3–0.5 cun. The ulnar nerve is the reason this stays shallow.
Angle
Perpendicular, shallow, in the groove — a licensed, careful point.
Electroacupuncture
Introductory charts rarely assign a standard electroacupuncture setting here. Clinics that use current choose frequency and intensity for that person. No milliamp figure is given, because copying one would be misleading.
Nearby on this channel
Support the Aged
Wrist cleft that opens when the palm turns inward.
True Shoulder
Back of the shoulder, just above the armpit crease.
Back Stream
Edge-of-hand point for the neck and the Du vessel.
Celestial Gathering
Center of the shoulder blade for that deep scapular ache.
Use caution
Herbs often paired for a similar pattern
A study link, not a formula and not a dose.
Tags
xiaohai · funny bone