Guang Earthworm

Traditional Use

Primary Actions

• Opens channels and collaterals - Guang Di Long is the premium-grade earthworm source long favored when post-stroke numbness, hemiplegia, painful obstruction, or channel blockage need a strong penetrating animal medicine.
• Clears Lung heat and calms wheezing - like Di Long generally, it is used for dyspnea, stubborn cough, and wheeze when heat and obstruction bind the Lung.
• Clears heat, extinguishes internal wind, and promotes urination - it can be chosen for spasms, red swollen painful joints, edema, or difficult urination when heat is part of the pattern.

Secondary Actions

• Guang Di Long specifically refers to the Guangdong-grade Pheretima aspergillum source, traditionally regarded as superior in authenticity and clinical strength.
• Modern quality control work focuses heavily on authentication because Guang Di Long is frequently adulterated with lower-value earthworm materials.

Classic Formulas

• Bu Yang Huan Wu Tang - a standard post-stroke formula in which Guang Di Long may be selected as the highest-quality channel-opening earthworm source.
• Guang Di Long with Ma Huang and Xing Ren - a traditional approach for Lung-heat wheezing and difficult breathing.
• Guang Di Long with heat-clearing and blood-invigorating herbs - used historically for red, swollen, painful obstruction and channel heat.

Classical References

• Chinese pharmacopoeial tradition distinguishes Guang-type and other Pheretima sources but preserves the same core functions of clearing heat, stopping spasms, and opening the channels.
• The designation Guang Di Long historically reflects daodi sourcing and quality preference rather than a totally different therapeutic category from Di Long.
• Its premium status is one reason authentication remains a major modern issue in the market.