Silkworm Droppings

Traditional Use

Primary Actions

• Dispels wind-dampness and unblocks the channels for joint pain, heaviness, numbness, and rheumatic painful obstruction.
• Harmonizes the Stomach and transforms turbid dampness, especially for abdominal pain, vomiting, diarrhea, and cramping when dampness obstructs the middle burner.
• Activates Blood and frees the collaterals in older use for limb pain, menstrual irregularity, and obstructive discomfort.
• Relieves itching and can be used externally for damp or wind-related skin irritation.

Secondary Actions

• Can Sha is the canonical dried mulberry-fed silkworm-droppings medicine and should not be confused with `Jiang Can`, the stiff silkworm body medicine.
• Traditional sources also recognize `Wan Can Sha` as a related naming lane, but the core material remains the same drug family.

Classic Formulas

• Can Shi Tang and related damp-turbidity digestive formulas ... the classic middle-burner use for vomiting, diarrhea, and leg cramping.
• Wind-damp Bi combinations with Sang Zhi, Fang Ji, or Yi Yi Ren ... the usual joint-and-channel context.
• External washes or warm compresses ... traditional practice for itching, swelling, and damp skin complaints.

Classical References

• Traditional herbology describes Can Sha as pungent, sweet, and warm, entering the Liver, Spleen, and Stomach.
• Classical texts consistently emphasize two main lanes ... wind-damp joint pain and damp-turbidity digestive upset.
• Older commentary also notes that Can Sha is mild and non-toxic, which helps explain its long use in external as well as internal applications.