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Sang Piao Xiao

Traditionally used for: Traditional Chinese formulas for weak bladder control. Bedwetting in children; Passing urine often at night.

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What is Sang Piao Xiao? Sang Piao Xiao is the dried egg case of the praying mantis. In Chinese medicine it is used for bedwetting in children, for passing urine often at night, and for some men's sexual complaints. It is nearly always used inside a herb formula, not on its own. The name means "mulberry egg case". Egg cases laid on mulberry branches were counted as the best grade. Today it is sold as a whole dried case, as broken pieces, or as a powder. Here is the short verdict. No human trials of this single herb have been published that we can point to. Long use in China is real, but long use on its own is not proof that a remedy works. How does Sang Piao Xiao work? The honest answer is that nobody has shown how it works in people. In Chinese medicine theory it is said to hold the kidney and bladder firm, so that urine is kept in. That is a traditional idea, not a tested mechanism. It is also said to be warming, so it is matched to people who feel cold and tired. Lab tests show the egg case holds protein, fat and minerals. A few animal and test-tube studies hint at effects on blood sugar and on cell damage. These are early findings and do not tell you what happens in a person. What forms does Sang Piao Xiao come in? Most often it is a whole dried egg case, boiled into a decoction (a tea made by simmering raw herbs). Herbalists usually steam it or dry-fry it first. That is the standard way it is made ready for use. It also comes as granules, powder or pills inside ready-made formulas. The best known of these is Sang Piao Xiao San. It is rarely sold on its own in the West. Where it comes from: It appears in the Shen Nong Ben Cao Jing, a Chinese herb book from about 1,800 years ago. A doctor named Kou Zongshi wrote up the formula Sang Piao Xiao San in the 12th century. The herb has stayed in steady use in China since then. Its main job has always been the same: bedwetting, frequent urination, and leaking of urine in older people.

Helps

What does Sang Piao Xiao help with? Bedwetting in children: This is the oldest and best known use. Chinese texts have recommended it for centuries, usually inside the formula Sang Piao Xiao San. We found no published human trial of the single herb for bedwetting. A child who wets the bed should be checked by a doctor first, since infection, diabetes and constipation can all cause it. Needing to pass urine often, especially at night: Traditionally used when the urine is clear and pale and the person feels cold and tired. There is no trial evidence we can cite for this use. Waking often to pass urine can be a sign of a bladder infection, an enlarged prostate (a gland near the bladder in men) or diabetes, so get it looked at. Leaking of urine in older adults: Chinese herbalists use it as one part of a warming formula for weak bladder control. No human trials support this. Proven options such as pelvic floor exercises and prescription bladder medicines have far better evidence. Semen loss during sleep or very quick ejaculation: Classical texts group these with weak bladder control and use the same herb. This rests on tradition alone. We found no human research testing it for these problems. Ongoing vaginal discharge: A secondary traditional use, again for a pattern seen as cold and weak rather than hot. There is no trial evidence. New or smelly discharge needs a doctor, because it may be an infection.

Sang Piao Xiao

Quick Facts

  • What it is: Sang Piao Xiao is the dried egg case of the praying mantis, used in Chinese medicine for bedwetting and frequent urination.
  • Main uses: Bedwetting in children, Passing urine often at night, Leaking of urine in older adults
  • Best for: Traditional Chinese formulas for weak bladder control
  • Active ingredients: Protein and amino acids, Fats, Calcium, magnesium and iron, Chitin
  • Forms: Whole dried egg case for a decoction, Granules, Powder, Pills within ready-made formulas
  • Time to effect: Unknown; tradition expects some change in two to four weeks.
  • Side effects: Mostly allergy risk, plus occasional stomach upset, dry mouth or constipation.
  • Pregnancy & breastfeeding: Not studied in pregnancy; avoid unless your clinician advises otherwise.

Educational information, not medical advice — ask your doctor or midwife.

What is Sang Piao Xiao?

Sang Piao Xiao is the dried egg case of the praying mantis. In Chinese medicine it is used for bedwetting in children, for passing urine often at night, and for some men's sexual complaints. It is nearly always used inside a herb formula, not on its own.

The name means "mulberry egg case". Egg cases laid on mulberry branches were counted as the best grade. Today it is sold as a whole dried case, as broken pieces, or as a powder.

Here is the short verdict. No human trials of this single herb have been published that we can point to. Long use in China is real, but long use on its own is not proof that a remedy works.

How does Sang Piao Xiao work?

The honest answer is that nobody has shown how it works in people.

In Chinese medicine theory it is said to hold the kidney and bladder firm, so that urine is kept in. That is a traditional idea, not a tested mechanism. It is also said to be warming, so it is matched to people who feel cold and tired.

Lab tests show the egg case holds protein, fat and minerals. A few animal and test-tube studies hint at effects on blood sugar and on cell damage. These are early findings and do not tell you what happens in a person.

What forms does Sang Piao Xiao come in?

Most often it is a whole dried egg case, boiled into a decoction (a tea made by simmering raw herbs). Herbalists usually steam it or dry-fry it first. That is the standard way it is made ready for use.

It also comes as granules, powder or pills inside ready-made formulas. The best known of these is Sang Piao Xiao San. It is rarely sold on its own in the West.

Where it comes from:

It appears in the Shen Nong Ben Cao Jing, a Chinese herb book from about 1,800 years ago. A doctor named Kou Zongshi wrote up the formula Sang Piao Xiao San in the 12th century.

The herb has stayed in steady use in China since then. Its main job has always been the same: bedwetting, frequent urination, and leaking of urine in older people.

If this is an emergency

Some reactions to Sang Piao Xiao need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.

Who should avoid Sang Piao Xiao?

  • Do not use if you are allergic to insects, shellfish or dust mites, because this is an insect product and may set off the same allergy.
  • Do not use if you are pregnant or breastfeeding, as it has never been tested for safety in pregnancy or in breast milk.
  • Do not give it to a child for bedwetting until a doctor has checked the child for infection, diabetes and bladder problems.
  • Do not use if you have signs of a urinary tract infection (a bladder infection), such as burning when you pass urine, fever, or blood in the urine.
  • Do not use if your urine is dark, scanty and burning, which Chinese medicine calls a heat pattern; this herb is traditionally avoided then.
  • Do not use if you take desmopressin, water pills (diuretics) or bladder medicines, unless the doctor who prescribed them agrees.
  • Do not use if you cannot confirm the supplier, since poorly stored or mislabelled animal products may carry mould or added drugs.

When should you see a doctor?

See a doctor before you start, if a child is wetting the bed, if an adult has suddenly started leaking urine, or if you are passing urine far more than usual. These changes can come from infection, diabetes or a prostate problem, and they need a proper check.

Stop the herb and see a doctor if you get a rash, itching, stomach pain that does not settle, or blood in your urine.

Get emergency help at once if your lips, tongue or throat swell, or if you find it hard to breathe. That can be a severe allergic reaction.

Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.

Reviewed by the HealisticMD editorial team How we grade evidence →

The published evidence for Sang Piao Xiao is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.

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