Cynodon dactylon (commonly called Bermuda grass or "doob" grass) has a longstanding place in traditional medicine systems, particularly in Ayurveda and folk practices across India and other tropical regions. It has been traditionally used to support or treat fever, among other ailments. According to Ayurvedic texts and ethnobotanical surveys, the plant's fresh juice or decoction has been administered orally to reduce fever, often attributed to its purported cooling, anti-inflammatory, and antipyretic effects.

However, the scientific evidence supporting these traditional claims is limited. Some experimental studies have evaluated the general pharmacological properties of Cynodon dactylon extracts, showing mild anti-inflammatory and antioxidant activities in vitro and in animal models. A few animal studies have hinted at possible antipyretic effects, but the results are preliminary and not widely replicated. There is a lack of well-designed clinical trials or rigorous pharmacological investigations directly confirming its efficacy against fever in humans.

In summary, while the use of Cynodon dactylon for fever is well-documented in traditional medicine, there is only weak scientific evidence to support this use. Its application for fever is thus primarily justified by tradition rather than robust scientific validation.