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Photo of Blister Beetle

Blister Beetle

斑蝥 · Bān Máo

Practitioner-only herb for stubborn skin lesions

Properties

WarmingWarming botanicalPungent

What it does

Blister beetle treats stubborn warts, hard tissue masses (scrofula), abdominal masses, and severe non-healing sores. In TCM, it breaks blood and erodes putrid tissue. The active compound cantharidin is used in modern dermatology for wart removal in dilute topical form. Extremely toxic; used in cancer-adjunct preparations.

How to take it

Topical

Used only by practitioners in topical applications (cantharidin extract for warts) or tiny internal doses (0.03–0.06g processed) in cancer-adjunct formulas. Single-use only.

Avoid self-use. Modern cantharidin (Cantharone) is dose-controlled

Safety

  • Extremely toxic. Causes severe blistering, kidney damage, and death at small doses
  • Strictly practitioner-only. Never source raw blister beetles
  • Strictly avoid during pregnancy. Strong abortifacient
  • Animal-derived. Skip if you have insect allergies
  • Talk to your doctor before starting, especially if you take medication

Where it comes from

Blister beetle (Mylabris phalerata) gets its name from the toxic compound cantharidin in its body, which raises blisters on contact with skin. The same compound was the basis of the historical 'Spanish fly' aphrodisiac, with disastrous results. In TCM, dried blister beetles are used cautiously for severe skin growths and tumors. Modern dermatologists use purified cantharidin to remove warts.