Taixi (KI3): The Kidney's Source Point — Acupoint Guide

Taixi: The Great Stream of Kidney Energy

Taixi (太溪, KI3), meaning “Great Stream” or “Great Ravine,” is the most important acupoint on the Kidney meridian and one of the most clinically significant points in all of TCM. As the Source (Yuan) point of the Kidney, it directly accesses the Kidney’s original Qi — the root energy that governs growth, reproduction, aging, and the body’s deepest reserves.

The name paints a picture: Tai (太) means “great” or “supreme,” and Xi (溪) means “stream” or “ravine.” Taixi represents the great stream of Kidney energy that flows through this point, connecting the body’s deepest energy reserves to the surface where they can be accessed and influenced.

Location: How to Find Taixi

Anatomical location: On the medial (inner) side of the ankle, in the depression between the medial malleolus (the bony bump on the inside of the ankle) and the Achilles tendon.

Simple method:

1. Find the prominent bony bump on the inside of your ankle (medial malleolus)
2. Feel for the Achilles tendon at the back of your ankle
3. The depression between these two landmarks is Taixi
4. Press gently — the point is often tender in people with Kidney deficiency

Verification: You should feel a slight pulse at this point in healthy individuals — the posterior tibial artery runs nearby, which is why TCM texts historically used Taixi as one of the nine pulse-reading points on the body.

Traditional Functions

1. Nourishes Kidney Yin and Tonifies Kidney Essence

As the Source point of the Kidney, Taixi directly strengthens the Kidney’s Yin, Yang, and Essence (Jing). It is the primary point for Kidney Yin deficiency — the pattern underlying many chronic conditions.

Used for:

• Night sweats and hot flashes
• Five-center heat (warm palms, soles, chest)
• Dry mouth and throat (especially at night)
• Low back pain and knee weakness
• Tinnitus (ringing in the ears)
• Thinning hair and premature graying

2. Benefits the Throat and Lungs

The Kidney meridian connects to the throat, and Kidney Yin provides the moisture that keeps the throat lubricated. When Kidney Yin is deficient, the throat becomes dry, scratchy, or chronically sore.

Used for:

• Chronic sore throat (dry, not red and swollen)
• Dry cough that worsens at night
• Hoarseness and voice loss
• Sore throat that recurs after every minor illness

3. Strengthens the Lower Back and Knees

The Kidney governs the bones and resides in the lower back. Taixi is one of the most commonly used points for chronic lower back pain rooted in Kidney deficiency.

Used for:

• Dull, aching lower back pain that worsens with fatigue
• Weak knees and legs
• Pain that improves with rest and warmth
• Age-related lower back degeneration

4. Regulates the Uterus and Supports Reproduction

The Kidney is the root of reproductive energy in TCM — it stores the Essence (Jing) that governs fertility, sexual function, and reproductive health.

Used for:

• Irregular menstruation
• Infertility (male and female)
• Impotence and low libido
• Frequent urination (especially at night)
• Nocturnal emissions

5. Calms the Mind and Grounds the Spirit

Kidney Yin anchors the Heart’s fire. When Kidney Yin is deficient, Heart Fire can rise uncontrolled, causing anxiety, insomnia, and restlessness. Taixi grounds this ascending energy.

Used for:

• Insomnia with anxiety
• Restlessness and mental agitation
• Poor memory from deficiency

Acupressure Techniques

Basic Kidney Nourishing Press

1. Cross one leg over the other for easy access to the inner ankle
2. Use your thumb to press into the Taixi depression
3. Apply firm, sustained pressure for 1–2 minutes
4. Breathe deeply into your lower abdomen as you press
5. Repeat on the other side

Taixi + Sanyinjiao Combination

Press Taixi (inner ankle) and Sanyinjiao (SP6, inner lower leg) simultaneously with thumb and middle finger. This combination powerfully nourishes Kidney and Spleen Yin.

Warm Foot Soak + Taixi Massage

1. Soak your feet in warm water for 10 minutes
2. Dry feet and press Taixi on both sides for 1 minute each
3. The warmth opens the channels, making acupressure more effective

Best time: Evening, before bed — the Kidney time in the TCM clock is 5–7 PM, but evening acupressure supports the Kidney’s resting and restoring functions.

Moxibustion at Taixi

Moxibustion at Taixi is excellent for Kidney Yang deficiency — when the body feels cold from the inside and the lower back is weak and chilly.

Best for:

• Cold lower back and knees
• Frequent clear urination at night
• Cold feet that don’t warm up in bed
• General fatigue with cold signs

Method: Use a moxa stick held 2–3 cm above the point for 5–10 minutes per side.

Clinical Applications Summary

Condition	How Taixi Helps
Chronic lower back pain	Tonifies Kidney, strengthens bones
Tinnitus and hearing loss	Nourishes Kidney, opens the ears
Night sweats	Nourishes Kidney Yin, anchors fluids
Chronic sore throat	Moistens throat via Kidney meridian
Infertility	Tonifies Kidney Essence
Frequent nighttime urination	Strengthens Kidney Qi
Insomnia with anxiety	Nourishes Kidney Yin to anchor Heart
Weak knees and legs	Strengthens Kidney, benefits bones
Hot flashes (menopause)	Nourishes Kidney Yin, cools virtual Heat

Combinations with Other Points

Combination	Purpose
Taixi + Zusanli (ST36)	Tonify Kidney and Spleen Qi for overall vitality
Taixi + Sanyinjiao (SP6)	Nourish Kidney and Liver Yin
Taixi + Mingmen (GV4)	Tonify Kidney Yang for lower back warmth
Taixi + Fuliu (KI7)	Night sweats and Yin deficiency
Taixi + Baihui (GV20)	Balance Kidney Yin (bottom) and governing Yang (top)
Taixi + Taichong (LV3)	Nourish Kidney Water to control Liver Yang

The Pulse at Taixi

Historically, Taixi was one of the nine pulse reading points used in TCM diagnosis. The quality of the pulse at Taixi reveals the state of Kidney energy:

Pulse Quality	What It Means
Moderate, palpable	Healthy Kidney energy
Weak, thin, barely felt	Kidney deficiency
Rapid and thin	Kidney Yin deficiency with Heat
Deep and weak	Kidney Yang deficiency
No pulse felt	Severe Kidney depletion

A TCM practitioner may check the Taixi pulse alongside the wrist pulse to get a complete picture of the patient’s Kidney health.

Precautions

• Avoid strong pressure in acute ankle injuries or inflammation
• Pregnancy — use with caution; consult a qualified practitioner
• Acupuncture at this point should only be performed by a licensed practitioner
• If the point is extremely tender, reduce pressure and work up gradually

Related Reading

• Mingmen (GV4) — the Gate of Life
• Yongquan (KD1) — another key Kidney point
• Sanyinjiao (SP6) — often combined with Taixi
• Jing (Essence) in TCM