Chinese chive (Allium tuberosum), known as "jiu cai" in traditional Chinese medicine (TCM), has a long history of use for a variety of health conditions. However, its application for skin disorders such as rashes and hives is based primarily on traditional or folk practices rather than robust scientific validation. In TCM, Chinese chive is sometimes used for its purported ability to "dispel wind," "remove dampness," and support "yang" energy, which may indirectly relate to skin health according to TCM theory. Some ancient texts mention its external use in poultices or baths for skin irritations, but these are generally not specific to rashes or hives, and the references are sparse and not standardized.

Modern scientific studies on Chinese chive focus mainly on its antimicrobial, anti-inflammatory, and antioxidant properties, but there is little to no direct clinical evidence supporting its efficacy in treating rashes or hives in humans. The traditional use thus rates low (1 out of 5) in terms of evidence, as it is based on anecdotal and historical sources without rigorous validation. As such, while Chinese chive may be mentioned in some herbal compendiums for skin conditions, there is insufficient scientific or clinical data to justify its use for rashes and hives beyond historical or traditional practice.