Zedoary Oil Classic Formulas … Natural Herb Library

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Moves qi and breaks blood stasis in concentrated aromatic form ... E Zhu You follows the broader E Zhu lane when fixed pain, masses, or severe stagnation call for the volatile fraction rather than the crude rhizome alone.
Relieves pain and reduces accumulations ... traditional logic centers on focal abdominal pain, food stagnation, traumatic swelling, and blood-stasis patterns where a sharper preparation is preferred.
Serves as a preparation-state record more than a major classical decoction herb ... the oil belongs to the concentrated medicinal derivative lane rather than to perfume, culinary flavoring, or generic essential-oil marketing.

E Zhu with San Leng ... the foundational mass-dispersing and blood-breaking logic that also informs how the concentrated oil preparation is interpreted.
Modern E Zhu You dosage forms such as injections, soft capsules, or suppositories ... a more contemporary preparation lane than the classical decoction tradition.
Topical aromatic pain applications ... used when localized stagnation and pain are the main treatment target.

Traditional medicinal logic for E Zhu You follows the E Zhu family of moving qi, breaking blood stasis, relieving pain, and dispersing accumulation.
The oil preparation is better understood as a concentrated pharmacy derivative than as a heavily documented stand-alone classical materia medica staple.