Abdominal Diagnosis (Fu Zhen) in TCM: Reading the Middle Jiao

What is Abdominal Diagnosis?

Abdominal Diagnosis (腹诊, Fù Zhěn), also called hara diagnosis in Japanese traditions, is a specialized palpation technique where the practitioner examines the abdomen through systematic pressing, feeling for tension, tenderness, temperature, and texture. The abdomen — particularly the area between the ribs and the pubic bone — is considered the residence of the internal organs and a direct window into their functional state.

In TCM, the abdomen houses the Middle and Lower Jiao, containing the Spleen, Stomach, Liver, Gallbladder, Intestines, Bladder, and Kidneys. Because these organs lie closest to the body surface in the abdominal region, palpation can reveal conditions that pulse and tongue diagnosis may miss.

Key principle: The abdomen is the “second brain” of TCM. Its tension, temperature, and sensitivity directly reflect the state of Qi, Blood, and organ function in the Middle and Lower Jiao.

The Abdominal Zones

TCM divides the abdomen into diagnostic zones corresponding to specific organs:

Zone	Location	Corresponding Organ(s)
Epigastric (胃脘)	Below sternum, above navel	Stomach, Heart
Upper abdomen	Between sternum and navel	Spleen, Stomach
Periumbilical	Around the navel	Small Intestine, Spleen
Lower abdomen	Below navel to pubis	Kidney, Bladder, Uterus, Large Intestine
Hypochondrium (胁肋)	Below ribs, both sides	Liver, Gallbladder
Left lower quadrant	Left side below navel	Large Intestine (descending)
Right lower quadrant	Right side below navel	Large Intestine (ascending), Appendix

Key Diagnostic Findings

Tension and Fullness

Finding	Location	TCM Pattern
Hard, board-like abdomen	Epigastric	Food stagnation, Phlegm accumulation
Soft, sunken abdomen	General	Qi or Yang deficiency
Distended, tympanic	General	Qi stagnation or Fluid accumulation
Muscle guarding	Epigastric	Stomach Heat or acute stagnation
Taut, string-like below ribs	Hypochondrium	Liver Qi stagnation
Resistant mass felt	Lower abdomen	Blood stasis, abdominal mass (Zheng Jia)

Tenderness and Pain Response

Tenderness Location	Pattern
Epigastric tenderness	Stomach Heat, Food stagnation, Stomach Yin deficiency
Right hypochondrial tenderness	Liver/Gallbladder disharmony, Gallbladder Damp-Heat
Left hypochondrial tenderness	Spleen enlargement, Blood stasis
Periumbilical tenderness	Spleen deficiency, Small Intestine Heat
Lower abdominal tenderness	Blood stasis (especially in women), Damp-Heat in Bladder
Tenderness relieved by pressure	Deficiency pattern
Tenderness worsened by pressure	Excess pattern

Temperature

Finding	Pattern
Warm abdomen	Normal or mild Heat
Hot to touch	Excess Heat in Stomach or Intestines
Cold to touch	Yang deficiency, Cold in Middle Jiao
Cold below navel, warm above	Kidney Yang deficiency with Upper Heat
Cold above navel, warm below	Spleen Yang deficiency

Sounds and Movement

Finding	Pattern
Loud borborygmi (rumbling)	Cold-Dampness in intestines
Faint borborygmi	Spleen Qi deficiency
Visible peristalsis	Severe Qi deficiency
Tender nodules ( ropes, bands)	Qi or Blood stagnation along meridian lines

The Abdominal Examination Technique

Patient Preparation

Patient lies supine (face up) on a firm surface
Knees slightly bent to relax abdominal muscles
Arms at sides, breathing naturally
Expose the abdomen from below the ribs to above the pubis
Ensure the room is warm — cold causes muscle tension that interferes

Practitioner Technique

Warm your hands — cold hands cause guarding
Start with observation — note the shape, symmetry, and any visible pulsations
Begin with light palpation — place hands flat, feel the surface temperature
Progress to moderate pressure — assess muscle tone and general tension
Deep palpation — press firmly in each zone to check for tenderness, masses, or organ enlargement
Compare sides — asymmetry is significant
Palpate systematically — epigastric → periumbilical → lower abdomen → hypochondria

Specific Palpation Tests

Epigastric Press Test:

Press firmly between the sternum and navel
If the patient feels pain that worsens with pressure → Excess (stagnation, Heat)
If the pain improves with gentle pressure → Deficiency (Cold, Qi deficiency)

Hypochondrial Sweep:

Press along the lower border of the ribcage on both sides
Tenderness on the right → Liver/Gallbladder
Tenderness on the left → Spleen
Bilateral tension → Liver Qi stagnation

Lower Abdominal Press:

Press gently in the lower abdomen below the navel
In women, check for tenderness that may indicate Blood stasis
A feeling of fullness or resistance suggests Fluid accumulation or Blood stasis

Abdominal Diagnosis and the Classics

The Shanghan Lun uses abdominal findings extensively to determine formula selection:

Abdominal Finding	Shanghan Lun Formula
Epigastric fullness, tenderness	Da Chai Hu Tang (Major Bupleurum)
Lower abdominal fullness, urgency	Tao He Cheng Qi Tang
Abdominal pain with cold extremities	Si Ni San (Frigid Extremities Powder)
Epigastric pounding sensation	Zhi Gan Cao Tang
Lower abdominal hardness	Di Dang Tang (for severe Blood stasis)
Abdominal fullness with constipation	Xiao Cheng Qi Tang

Key Takeaways

Abdominal diagnosis examines the abdomen through systematic palpation of zones
Tenderness that worsens with pressure = Excess; improves with pressure = Deficiency
The hypochondria reflect Liver/Gallbladder; the epigastrium reflects Stomach/Spleen
Temperature differences between upper and lower abdomen reveal Cold/Heat patterns
The Shanghan Lun uses abdominal findings as key criteria for formula selection
Always compare sides and work systematically from light to deep pressure

Disclaimer: This article is for educational purposes only. Abdominal palpation should be performed by qualified practitioners. If you experience acute abdominal pain, seek immediate medical attention.