Zusanli (ST36): The Longevity Point — Acupoint Guide

Zusanli: The Most Important Acupoint for Health and Longevity

Among the hundreds of acupuncture points on the human body, Zusanli (足三里, ST36) stands alone as the most celebrated point for promoting health, vitality, and longevity. Known as the “Longevity Point,” it has been revered in Traditional Chinese Medicine for over two thousand years.

The name Zusanli literally means “Leg Three Miles” (足 = foot, 三 = three, 里 = mile). According to tradition, stimulating this point can restore enough energy for a person to walk another three miles even when exhausted.

Location: How to Find Zusanli

Zusanli is located on the lower leg, on the Stomach Meridian of Foot-Yangming (足阳明胃经):

Sit with your knee bent at about 90 degrees
Find the depression below the kneecap (the “eye of the knee,” known as Dubi ST35 or Xiyan)
Measure 3 cun (about four finger-widths) directly below this point
Move one finger-breadth lateral (toward the outside of the leg) from the anterior crest of the tibia (shinbone)
You should feel a slight depression — this is Zusanli

A helpful tip: When you press the correct spot, you will often feel a distinct soreness or ache (得气, “deqi” sensation) that may radiate downward toward the foot.

Precise Anatomical Description

Landmark	Description
Meridian	Stomach Meridian of Foot-Yangming
Location	3 cun below Dubi (ST35), one finger-breadth lateral to the anterior crest of the tibia
Depth	1–2 cun (needle insertion depth for acupuncture)
Bilateral	Present on both legs

Functions of Zusanli

Zusanli is classified as the He-Sea point (合穴) of the Stomach Meridian and the Lower He-Sea point (下合穴) of the Stomach. Its primary functions include:

Tonifying Spleen and Stomach

As the He-Sea point of the Stomach meridian, Zusanli directly strengthens the digestive system. The Spleen and Stomach are regarded in TCM as the “Postnatal Foundation” (后天之本) — the source of Qi and Blood production. When Spleen and Stomach function well, the entire body is nourished.

Supporting Qi and Blood

Zusanli is one of the most powerful points for tonifying Qi (补气) and nourishing Blood (养血). It is commonly used for:

General fatigue and weakness
Poor appetite and digestive weakness
Anemia and pale complexion
Recovery from illness or surgery

Strengthening the Body and Boosting Immunity

Regular stimulation of Zusanli is believed to strengthen the body’s defensive Qi (卫气), enhancing resistance to illness. Modern research has shown that acupuncture at ST36 can modulate immune function.

Calming the Spirit

Zusanli also has a calming effect on the Shen (spirit), helping to ease anxiety, insomnia, and restlessness that stem from Spleen and Stomach deficiency.

Clinical Applications

Digestive Disorders

Zusanli is the first-choice point for virtually all digestive complaints:

Nausea and vomiting — harmonizes Stomach Qi and directs it downward
Abdominal pain and distension — promotes Qi circulation
Diarrhea and loose stools — strengthens Spleen’s transforming function
Constipation — promotes intestinal motility
Gastritis and ulcers — supports healing of the Stomach
Poor appetite — awakens the Spleen’s transport function

Fatigue and Weakness

For chronic fatigue, post-illness weakness, or general debility:

Combines well with Qihai (CV6) and Guanyuan (CV4) for profound Qi tonification
Useful for Qi deficiency patterns with shortness of breath and reluctance to speak

Immune Support

Frequent colds and infections
Allergic conditions
Autoimmune disorders (as an adjunct therapy)

Pain Management

Knee pain — local point for joint disorders
Lower leg pain and cramps — promotes local Qi and Blood circulation
Headaches (frontal, related to Stomach meridian pathway)

Longevity and Preventive Care

This is where Zusanli truly distinguishes itself. In classical TCM, regular moxibustion on Zusanli was considered one of the most effective preventive health practices.

Acupressure: Self-Care Technique

You don’t need to be an acupuncturist to benefit from Zusanli. Acupressure is a safe and effective self-care method:

Step-by-Step Method

Find the point using the location guide above
Apply firm, steady pressure using your thumb or middle finger
Press deeply until you feel a dull ache or soreness (the deqi sensation)
Maintain pressure for 1–3 minutes on each leg
Use circular motions — small clockwise circles can enhance the effect
Repeat daily, preferably in the morning or before meals

Frequency and Duration

Goal	Frequency	Duration per point
General wellness	Daily	1–2 minutes
Digestive issues	2–3 times daily	2–3 minutes
Fatigue recovery	Morning and evening	3–5 minutes
Immune support	Daily in autumn/winter	2–3 minutes

Moxibustion on Zusanli: The Ancient Longevity Practice

Moxibustion (艾灸) on Zusanli is one of the most time-honored health practices in TCM. The burning of mugwort (艾叶) over the point provides deep warming and tonification.

The Famous Saying

“若要安，三里常不干” — “If you want peace and health, Zusanli should never be dry [from moxibustion]”

This proverb, attributed to the Song Dynasty, reflects the belief that regular moxibustion on Zusanli is key to a long and healthy life. The “not dry” refers to the moxibustion scars that were traditionally maintained as a sign of ongoing treatment.

How to Perform Moxibustion on Zusanli

Moxa stick method: Light a moxa stick and hold it 2–3 cm above the point, moving it in small circles
Duration: 10–15 minutes per point, until the skin becomes pleasantly warm and slightly red
Frequency: Daily or every other day for preventive care
Best seasons: Autumn and winter (when Yang Qi tends to decline)

Benefits of Moxibustion on ST36

Warms and tonifies Spleen and Stomach Yang
Strengthens defensive Qi
Improves digestion and absorption
Supports longevity and healthy aging
Relieves cold-type pain and stiffness

Precautions

While Zusanli is generally very safe, keep these precautions in mind:

Pregnancy: Use caution — while not absolutely contraindicated, strong stimulation should be avoided during pregnancy
Over-stimulation: Excessive moxibustion or pressure can cause local irritation or burns
Bleeding disorders: Avoid acupuncture if you have a bleeding disorder; acupressure is safer
Open wounds: Do not apply moxibustion or pressure over broken skin
After meals: Wait at least 30 minutes after eating before stimulating Zusanli
Severe conditions: Zusanli is a supportive point — do not rely on it alone for serious medical conditions

Zusanli in Combination with Other Points

Zusanli is rarely used in isolation. Common pairings include:

Combination	Purpose
ST36 + CV6 (Qihai)	Powerful Qi tonification
ST36 + CV12 (Zhongwan)	Digestive weakness
ST36 + SP6 (Sanyinjiao)	Qi and Blood tonification
ST36 + LI4 (Hegu)	General immune support
ST36 + GB34 (Yanglingquan)	Knee and leg pain
ST36 + CV4 (Guanyuan)	Deep constitutional strengthening

Key Takeaways

Zusanli (ST36) is the most important point for health maintenance and longevity in TCM
It tonifies Spleen and Stomach — the body’s “Postnatal Foundation” of Qi and Blood
Effective for digestive disorders, fatigue, immune support, and pain
Acupressure is a simple and safe self-care technique anyone can practice
Moxibustion on Zusanli has been used for centuries as a longevity practice
The proverb “若要安，三里常不干” encapsulates its importance in preventive health

Disclaimer: This article is for educational purposes only. Acupuncture should only be performed by a licensed practitioner. If you have a medical condition, consult your healthcare provider before beginning any new health practice.