Yan Sang Piao Xiao (盐桑螵蛸; Yán Sāng Piāo Xiāo; Latin: Ootheca Mantidis; English: salt-processed mantis egg case) is the dried egg case of the praying mantis — the foamy spongy capsule the mantis cements to mulberry twigs, salt-processed and toasted, the small tan nugget herbalists reach for when the body leaks. It is warm, sweet and salty, enters the Liver and Kidney channels, and its core actions are to supplement the kidney and support yang, and to astringe and secure. It is the quiet keeper of what the lower body should hold. The usual amount is 5–10 g in a decoction. It soaks 30 minutes before cooking; no special first, last, or wrapped step. It is not swallowed raw or as a snack.
It is not Hai Piao Xiao. Cuttlefish bone is slightly warm, salty and astringent — it secures, stops discharge, and curbs acid, better for excess vaginal discharge, stomach acid, and bleeding; this mantis egg case is warm, sweet and salty — it supplements kidney yang and secures the lower burner, better for weak sexual function and bed-wetting. It is not a hot fire-tonic; it is a gentle warm-and-hold. In yin-deficiency with fire — night sweats, a dry mouth, a red tongue — or in damp-heat pouring downward, using it on your own is a poor match. Bed-wetting and leaking in a child or the elderly need a clinic first. Do not take it yourself for a long time.
It is used most often for three patterns:
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Frequent urination at night, bed-wetting, urine that will not hold, turbid dribbling — the bladder not secured
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Sexual weakness, seminal emission, cold lower back and knees, fear of cold — kidney yang insufficient
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Yin-deficiency with fire, or damp-heat pouring downward — seek care / skip it
Warm, sweet, and salty, it is not a daily "bladder-nut" to keep eating. Securing when there is no leak, or in damp-heat, locks the pathogen in instead of helping.
When irregular routines and strain thin the kidney qi, the bladder loses its hold — nights bring repeated trips, the urine leaks, the essence slips — and the body needs a gentle warm-and-secure, not a drain. Yan Sang Piao Xiao is warm, sweet, and salty. It supplements the kidney, supports yang, and secures the lower burner, which is why it appears in Sang Piao Xiao San (Mantis Egg-Case Powder)–type formulas. It holds more than it flushes. In yin-deficiency with fire, or damp-heat, more makes it worse.
Yan Sang Piao Xiao is not a catch-all urine or emission keeper. In yin-deficiency with fire, in damp-heat, in pregnancy, or with no leak, using it alone is a poor match. Whether it belongs in a formula, and at what dose, should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.
