KD3 (Taixi) — Great Stream

KD3, known as Taixi or Great Stream, is the source point of the Kidney meridian, sitting in the hollow between the inner ankle bone and the Achilles tendon. It is the point to reach for when you feel run down, chronically tired, or battling a dry, sore throat that never quite clears.

At a Glance

Meridian	Kidney (KI/KD)
Body region	Inner ankle, midway between the ankle bone and the Achilles tendon
Best for	Fatigue, sore throat, weak lower back and knees, insomnia, kidney-deficiency tiredness
Difficulty	Easy to reach barefoot with your thumb
Hold time	1–2 minutes per ankle
Frequency	1–2 times daily
Pairs well with	KI1 (Yongquan), BL23 (Shenshu), SP6 (Sanyinjiao)
Skip if	Recent ankle injury or broken skin over the inner ankle (see Precautions)

Why KD3 Matters

KD3 is the source point of the Kidney meridian, which traditional Chinese medicine links to the deep reserves of energy behind vitality, and to the Yin fluids that moisten the throat. It sits just behind the inner ankle, between the ankle bone and the Achilles tendon, and it shows up in our foot routines whenever the theme is Kidney energy, fatigue, or that bone-tired feeling that rest does not fix. Because the Kidneys are classically said to govern the bones and marrow, KD3 is also a traditional stop for weak knees and a tired, aching lower back.

KD3 is easy to reach barefoot and pairs naturally with the rest of the foot region's grounding work. It combines with KI1 for deep fatigue, with BL23 on the lower back for lumbar tiredness, and with SP6 and HT7 for sleep and stress. If you have been running on empty for weeks and your body feels like it is asking for a recharge, KD3 is usually the first point practitioners reach for.

Location

KD3 is on the inner ankle, in the depression between the medial malleolus (inner ankle bone) and the Achilles tendon, level with the top of the ankle bone. The hollow sits roughly midway between the bone and the tendon — not pressed into either ridge. Because the point sits close to bone and tendon, ease off rather than digging into the edge.

Three quick confirmations you have the right spot: (1) it is the soft depression centered between the inner ankle bone and the Achilles tendon, level with the top of the bone; (2) it is distinctly tender compared with the skin around it; (3) pressing toward the bone with a slow, steady thumb produces a deep, achy sensation that may feel like it spreads up the leg.

When to Use KD3 (and When Not)

Use it when

• You feel deeply fatigued and running on empty for weeks
• Your throat is dry, sore, or scratchy and nothing seems to help
• Your lower back and knees feel weak, tired, or achy
• You want a grounding Kidney point in a bedtime or fatigue routine

Hold off if

• You recently sprained or injured the inner ankle
• The skin over the point is broken, cut, or has a rash
• The ankle is swollen, warm, or acutely painful
• Pressure causes a shooting pain or numbness down the foot

Use the Hold off column as a safety filter: KD3 is a restorative practice for chronic tiredness and dryness, not first aid for an acute ankle injury.

Benefits & Uses

Kidney energy: KD3 nourishes Kidney yin and yang, supporting vitality and adrenal reserve.
Chronic fatigue: It helps restore energy levels in those experiencing burnout or exhaustion.
Sore throat: KD3 moistens the throat and is a traditional point for dry, scratchy throats that linger.
Lower back and knees: It strengthens a tired, weak lower back and supports wobbly knees.
Insomnia: As a Kidney Yin point, KD3 helps quiet a restless mind and supports sleep.

How to Massage KD3

Press with your thumb at roughly 90 degrees to the skin, deepen slowly until you feel the deep, dull ache practitioners call deqi, then hold with even breathing. The ankle area is more delicate than the sole, so steady and slow beats hard.

Sit with your leg comfortably positioned to reach the inner ankle.
Place your thumb on the KD3 point between the ankle bone and the Achilles tendon.
Apply firm, steady pressure with a gentle circular motion.
Hold for 1–2 minutes, breathing slowly, then switch to the other ankle.
Repeat once or twice daily as part of a fatigue, throat, or bedtime routine.

Common mistake to avoid: pressing directly into the bone or the tendon edge instead of the hollow between them. The target sensation is a deep, dull, spreading ache in the soft depression — if you feel a sharp pinch against bone or a shooting pain, ease off.

Combine KD3 with These Points

KD3 restores best as part of a routine. Pick the row closest to your situation and work the points in the order shown, 1–2 minutes each.

Goal / symptom	Routine (in order)
Deep fatigue and burnout	KD3 → KI1 → BL23 (Shenshu), 1–2min each, morning and evening
Poor sleep and a restless mind	KD3 → HT7 → SP6, as a nightly bedtime sequence
Weak, tired lower back	BL23 → KD3 → BL40, 60s each, alongside gentle movement
Dry, scratchy throat	KD3 → SP6, 2min each, 2–3 times daily, with warm fluids and rest

For a fuller program, see the foot acupressure points body guide and our acupressure for sleep page.

What to Expect

First session (today)

The point is usually noticeably tender, and the deep, achy sensation can be surprising at first. Many people feel a general sense of release or warmth in the ankle area within a few minutes. Do not expect your energy to return after a single press — the first session is mostly about learning the spot.

Days 3–7 (consistent daily practice)

With 1–2 sessions per day, the tenderness at the point usually eases, and people often report feeling a bit less drained and sleeping more soundly. This matches the pattern in studies of acupressure for fatigue and sleep, where benefits tend to appear after several days of regular use.

Weeks 2–4

For chronic fatigue, KD3 works best as one piece of a broader plan that includes sleep, food, and movement. If you are still exhausted after 2–3 weeks, or if fatigue is accompanied by weight loss, fever, or shortness of breath, see a clinician — persistent tiredness deserves a proper workup rather than more pressure.

Science & Research

Evidence on acupressure for fatigue, sleep, and pain has grown in recent years. Systematic reviews and randomized controlled trials have examined acupressure as an adjunct for these conditions, with results that are generally promising but limited in quality. Meta-analyses of acupressure for fatigue and sleep tend to show a positive direction of effect, though many of the included studies are small and their methodological quality varies considerably.

Researchers consistently note that acupressure trials are hard to blind, because the treatment is physical and participants can usually tell whether they are being treated. This makes it difficult to separate the specific effects of a particular point such as KD3 from the general benefits of touch, pressure, and relaxation. The overall picture — which we discuss in detail on our does acupressure work? review — is one of encouraging signals alongside a clear need for larger, higher-quality studies before firm conclusions can be drawn. For sleep and anxiety specifically, our acupressure for anxiety page and acupressure for sleep page summarize the strongest available evidence.

Verifiable sources

Chen HM, Wang HH, Chiu MH, Hu HM. Effects of acupressure on anxiety: a systematic review and meta-analysis. Journal of Alternative and Complementary Medicine. 2022;28(5):514-524. PMID 35235358

The meta-analysis above evaluated acupressure for anxiety, which is the context where KD3 is often used. It is not a study of KD3 in isolation.

Precautions

Avoid if you recently sprained or injured the inner ankle, or if the joint is swollen and painful.
Do not press over broken skin, cuts, rashes, or blisters on the inner ankle.
Use gentle pressure — the area between the ankle bone and tendon contains sensitive nerves and blood vessels.
Stop if you feel a sharp or shooting pain, or numbness spreading into the foot.

Red Flags — See a Professional

Stop self-treatment and see a doctor if you notice any of the following:

Fatigue so profound that it interferes with daily life, or fatigue that follows an illness
Fatigue together with unexplained weight loss, fever, or night sweats
A sore throat that is severe, lasts more than a couple of weeks, or makes swallowing difficult
Ankle swelling, warmth, or pain that appears suddenly after an injury
No improvement after 2–3 weeks of consistent acupressure and rest

Frequently Asked Questions

How do I find KD3 on myself?

KD3 sits on the inner ankle, in the soft depression centered between the inner ankle bone and the Achilles tendon, level with the top of the ankle bone. Slide your thumb into that groove — the tender hollow in the middle, not on either ridge, is the point.

How long and how often should I press KD3?

Hold KD3 for 1–2 minutes per ankle at the deepest comfortable pressure, and repeat once or twice daily. For fatigue, a morning and evening session works well; for sleep, use it as part of your bedtime routine. Consistency over weeks matters more than pressing harder.

Can KD3 help with a dry, sore throat?

Yes. KD3 is a traditional point for moistening a dry, scratchy throat that lingers, especially when it is accompanied by fatigue. Press it for 2 minutes per ankle with SP6, and keep up fluids and rest. A severe, long-lasting, or hard-to-swallow throat needs a doctor.

Is KD3 safe to use for tired lower back and knees?

KD3 is a traditional point for weak, tired lower back and knees because the Kidney meridian is classically said to govern the bones. Combine it with BL23 on the lower back and gentle movement, and avoid it if the pain follows a sudden injury or comes with numbness or weakness.

Can I press KD3 at work or on the go?

Yes. While seated, cross the ankle over the opposite knee and press the point with your thumb — no tools or lying down required. A short 60-second press per ankle makes a good mid-afternoon energy reset without anyone noticing.

When should I see a doctor instead of using KD3?

See a doctor if fatigue interferes with your daily life, comes with weight loss, fever, or night sweats, or has not improved after 2–3 weeks of consistent practice. A severe or persistent sore throat, and any ankle pain after a sudden injury, also deserve medical attention.

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