Yellow Azalea Flower Classic Formulas … Natural Herb Library

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Dispels wind-damp and relieves pain ... Nao Yang Hua is a strongly toxic historical herb used for painful obstruction, cold-damp joint pain, and certain severe stubborn pain patterns.
Moves blood and reduces swelling ... traditional use also extends to traumatic pain and localized swelling where a drastic toxic herb was judged necessary.
Requires safety-first interpretation ... this is not a routine flower tea or ornamental azalea page, but a toxic medicinal lane with a narrow historical use window.

Wind-damp pain combinations in small guarded doses ... usually as an adjunct rather than a stand-alone daily herb.
External-use powders or washes for painful swelling ... traditional route choices often reflect awareness of the herb's toxicity.
Historical pain and trauma prescriptions for severe stubborn patterns ... a narrow lane that should not be generalized to casual home use.

Traditional materia medica describes Nao Yang Hua as acrid, warm, and highly toxic, entering the Liver to dispel wind-damp and relieve pain.
Older indications include abdominal pain, headache, rheumatic pain, and traumatic swelling, but always under the shadow of significant toxicity.