Pyrrosia, a genus of ferns often used in Traditional Chinese Medicine (TCM), is primarily known for its application in treating urinary tract issues, heat-related symptoms, and as a diuretic. Its most common species in herbal medicine is Pyrrosia lingua (Shi Wei). The use of Pyrrosia for dizziness is not a mainstream application in traditional or modern practice. However, some traditional texts and practitioners mention its inclusion in formulas that might address dizziness, particularly when dizziness is believed to be secondary to "damp-heat" or urinary retention patterns—conditions that TCM sometimes links to symptoms like dizziness due to imbalances in body fluids or obstruction of clear yang to the head.

There is minimal direct traditional documentation supporting Pyrrosia as a primary herb for treating dizziness. Rather, when it is used in formulas that include other, more directly relevant herbs, its role is usually supportive—clearing heat or facilitating urination, which in TCM theory could indirectly help with dizziness caused by excess fluids or phlegm. There is no significant scientific research or clinical trial evidence validating the use of Pyrrosia for dizziness, and it is not a standard herb for this indication in either TCM or Western herbal literature. Therefore, its use for dizziness is based on limited traditional rationale and is not well-supported by current evidence.