The use of "Lotus" (typically referring to Nelumbo nucifera, also known as the sacred lotus) for kidney stones is primarily based on traditional medicine practices, particularly in Asian countries such as China and India. In Traditional Chinese Medicine (TCM) and Ayurveda, various parts of the lotus plant—including the seeds, leaves, and roots—have been used for centuries to promote diuresis (increased urine production), support urinary tract health, and treat a range of kidney-related ailments. However, the specific use of lotus for the dissolution or expulsion of kidney stones is not strongly emphasized in these systems compared to other herbs.

Scientific research on lotus and its direct effects on kidney stones is minimal. There are some studies indicating that lotus extracts possess diuretic, antioxidant, and anti-inflammatory properties, which could theoretically be beneficial in preventing stone formation or easing symptoms. However, there is a lack of robust clinical evidence or controlled human trials demonstrating that lotus is effective for treating or preventing kidney stones. Therefore, while its use is rooted in tradition, the evidence supporting its efficacy for kidney stones is weak and largely anecdotal.

In summary, lotus is traditionally used for general kidney and urinary health, but there is insufficient scientific validation for its use specifically for kidney stones.