Labisia pumila, commonly known as "Kacip Fatimah," is a traditional medicinal herb widely used in Malaysia and other parts of Southeast Asia, particularly among Malay women. Its use for women’s reproductive health is well-documented in ethnobotanical surveys and traditional medical texts. Specifically, Labisia pumila has been traditionally used to alleviate various menstrual disorders, including symptoms associated with premenstrual syndrome (PMS), such as mood swings, breast tenderness, and irritability—symptoms characteristic of PMS Type S (the "S" standing for "swelling" and related symptoms).

The traditional rationale for its use stems from the herb's reputed phytoestrogenic activity and its ability to support hormonal balance. While some scientific studies have explored the general effects of Labisia pumila on women's health—such as its antioxidant, anti-inflammatory, and mild estrogenic effects—there is limited direct clinical research specifically on PMS Type S. Most evidence remains anecdotal or based on traditional use, and the rating reflects the gap between widespread traditional usage and the modest level of scientific validation specifically for PMS Type S.

In summary, Labisia pumila is traditionally used to support PMS-related symptoms, but robust clinical evidence for its efficacy in PMS Type S is still lacking.