Eggplant Root Classic Formulas … Natural Herb Library

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Clears local toxic heat and reduces swelling ... regional folk use applies Jia Gen to toothache, inflamed gums, boils, and other superficial painful swellings.
Relieves pain and unblocks fixed soreness ... the whole root or root-crown is used more for chronic aching and traumatic discomfort than for the culinary food lane associated with eggplant fruit.
Addresses rough damp-heat bowel complaints in minor regional practice ... some use extends to diarrhea or dysenteric irritation, but the root remains a small folk medicine rather than a textbook staple.

Fresh-root poultice or decoction folk use ... a practical rather than classical lane for toothache, boils, and painful swelling.
Whole-root pairings with other heat-clearing topical herbs ... used where inflammation and pain are both obvious.
Decoction use for chronic painful obstruction ... regional practice rather than a famous pharmacopoeial formula.

Jia Gen is best treated as a minor regional root medicine from the eggplant plant rather than as a major canonical decoction herb with a deep formula history.
Because the plant is widely eaten as food, it is easy to overgeneralize from the fruit to the root ... the medicinal page should stay conservative and root-specific.