Han Shui Shi
Quick Facts
- What it is: A cold mineral used in Chinese herb mixes, made of chalk-like calcite or a salt rock.
- Main uses: High fever with thirst, Heat stroke signs, Mouth and gum sores, Heat rash on the skin
- Best for: Short use in cooling herb formulas for acute heat
- Active ingredients: Calcium carbonate (calcite), Calcium and sodium sulfate (glauberite), Trace minerals from the rock
- Forms: Raw crushed mineral for boiling, Roasted fine powder for the skin, Pills, powders and granules that hold it as one part
- Time to effect: Old practice claims relief within hours to a day or two; no trial backs this.
- Side effects: Loose stools and belly chill are common; high blood calcium, kidney stones and toxic metals are the real risks.
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What is Han Shui Shi?
Han Shui Shi is a cold mineral used in Chinese herbal care. It is crushed and cooked in herb teas. Herbalists give it for high fever, strong thirst, and hot skin rashes.
The name covers more than one rock. In north China it is often calcite, a chalk-like stone. In the south it may be a salt rock that holds sodium (salt) and sulfate.
Here is the plain verdict. The mineral has long standing in Chinese texts, but we found no human trials of it. Long use is not proof that a remedy works, so treat the claims below as tradition, not fact.
How does Han Shui Shi work?
In Chinese medicine, Han Shui Shi is called very cold in nature. Herbalists use it to "clear heat", which means to cool fever and calm thirst. It is almost always one part of a mix, not a lone remedy.
In plain chemistry it is mostly chalk or a salt rock. Chalk can soak up acid in the stomach. That may explain a mild soothing effect, but this is a guess.
No study has shown what it does inside the human body. The cooling idea comes from old texts, not from lab work.
What forms does Han Shui Shi come in?
You will meet it most often inside a mixed herb tea, not on its own.
Raw chunks are broken up and cooked in the pot first, before the other herbs go in. Roasted (calcined) stock is crushed to a fine powder. That powder is dusted on the skin for heat rash or small burns.
Some ready-made pills, powders and granules list it as one part of a blend. Single-mineral tablets are rare in the West.
Where it comes from:
Han Shui Shi appears in early Chinese drug books, about two thousand years ago. It sits in the group of cold minerals used for strong fever.
Old texts pair it with Shi Gao (gypsum) for burning heat and dry mouth. Herbalists still use the two rocks that way.
Its place is steady but modest. It plays a helper role in a formula rather than a lead one.
Who should avoid Han Shui Shi?
- Do not use if you are pregnant or breastfeeding, unless your doctor says it is safe.
- Do not use if you are buying it for a child or a frail older adult without guidance from a trained herbalist and a doctor.
- Do not use if you have weak, cold digestion, such as loose stools, a cold belly or poor appetite.
- Do not use if you have kidney disease or you have ever had kidney stones.
- Do not use if you have hypercalcaemia (too much calcium in the blood) or an overactive parathyroid gland (a small neck gland that controls calcium).
- Do not use if you take digoxin (a heart drug), because extra calcium can upset the heart rhythm.
- Do not use if you take thiazide water pills, which already push blood calcium up.
- Do not use if you are on a low-salt diet for heart failure or high blood pressure, since one form of this rock holds sodium (salt).
- Do not use if you have stock from an unlabelled or untested source, as mined rock can hold lead, arsenic or mercury.
- Do not use if you want to dust the powder on deep burns, large wounds or broken skin.
- Do not use if you plan to take it for weeks without blood calcium and kidney checks.
When should you see a doctor?
See a doctor now if a fever stays above 39C, lasts more than three days, or comes with a stiff neck, a rash, confusion or trouble breathing.
Call emergency help for signs of heat stroke: hot dry skin, a racing heart, fits or blackouts. Cool the person and give fluids while you wait.
Stop the mineral and ring your doctor if you get heavy thirst, weak muscles, muddled thinking, belly pain, or an odd heartbeat. Also ask for advice before you start if you take any regular medicine.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
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