Ilex Rotunda Bark Classic Formulas … Natural Herb Library

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Clears heat and resolves toxin - Jiu Bi Ying is used for sore throat, hot dysentery, damp-heat skin eruptions, and swollen painful toxic lesions.
Drains dampness and relieves pain - the bark is also used for damp-heat abdominal pain, joint pain, traumatic swelling, and painful obstruction with redness or inflammation.
Cools the blood and reduces swelling - regional usage includes decoctions, washes, or poultices for boils, eczema, and bruised or inflamed tissue.

Jiu Bi Ying with Mu Xiang or Bai Tou Weng - regional dysentery strategy when damp-heat and toxic heat produce abdominal pain, tenesmus, or bloody stool.
Jiu Bi Ying with Man Jing Zi or Ban Lan Gen - throat-swelling and wind-heat pairing logic for red painful throat with toxic heat.
Topical washes or poultices with Ku Shen or Huang Bai - damp-heat skin strategy for eczema, sores, and moist inflamed lesions.

Official Chinese references describe Jiu Bi Ying as bitter and cold, entering the Lung, Stomach, Large Intestine, and Liver to clear heat, detoxify, dispel dampness, and relieve pain.
The standard traditional indications include pharyngitis, dysentery, eczema, painful joints, and traumatic injury with swelling.
Its strongest identity is as a heat-toxic and damp-heat bark rather than as a general tonic or harmonizing herb.