Tongue Observation in TCM
Tongue inspection (舌診, she zhen) is one of the four classical examinations in Chinese medicine. A practitioner looks at the tongue body, its color, shape, moisture, and coating, and reads these alongside the pulse, history, and other signs. This page explains the framework and lets you build a descriptive observation. It does not diagnose anything.
Build a descriptive observation
Look at your tongue in natural light, ideally in the morning before brushing or eating. Choose what you see. All processing happens in your browser; nothing is uploaded or stored.
The four things a practitioner looks at
| Feature | What is observed | Traditional associations |
|---|---|---|
| Body color | Pink, pale, red, deep red, or purple | Pale is traditionally linked with cold or deficiency; red with heat; purple with stasis |
| Shape | Size, edges, cracks, movement | Swelling and teeth marks with dampness or qi deficiency; cracks with dryness; a red tip with heat |
| Coating | Color, thickness, distribution, greasiness | Thin white is normal; thick or greasy coating with dampness or phlegm; yellow with heat; absence with yin deficiency |
| Moisture | Dry, normal, or overly wet | Dryness with heat or yin deficiency; excessive moisture with dampness |
Classical sources for tongue inspection include the Huangdi Neijing and later Song and Ming dynasty texts that developed the method into a system. Modern TCM textbooks standardize the descriptions, but the interpretation remains a traditional clinical skill.
What this page is not
- It is not a diagnosis. A tongue sign alone cannot identify a condition.
- It does not use photos or AI. No image is uploaded, and no health data is stored.
- It does not replace a practitioner who can see the tongue in person and take a full history.
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