Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Arisaema species, particularly Arisaema japonicum and Arisaema erubescens, have a history of use in traditional Chinese medicine (TCM) and other East Asian herbal systems. In TCM, the dried tuber (often processed and known as "Tian Nan Xing") is traditionally prescribed for conditions involving "wind-phlegm," swelling, and some skin disorders including eczema. However, the rationale is based on energetic and humoral theories rather than modern biomedical mechanisms. There is limited documentation about its direct topical or systemic use specifically for eczema, and most references are as part of complex herbal formulas rather than as a single-ingredient therapy.

Regarding scientific evidence, there is a lack of robust clinical trials or preclinical studies directly investigating Arisaema's efficacy for eczema or atopic dermatitis. Some laboratory studies have explored the anti-inflammatory and immunomodulatory properties of Arisaema extracts, but these have not been directly linked to eczema models. Furthermore, the raw tuber is known to be toxic and requires careful processing, limiting its use in modern clinical settings.

Overall, Arisaema's use for eczema is mainly justified by traditional practice, with minimal scientific validation. Its evidence rating is low due to the absence of high-quality research specific to eczema.

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