The use of White Pear (Pyrus spp.), particularly in Traditional Chinese Medicine (TCM), is based primarily on historical and traditional practices. White Pear is known in TCM as "Bai Li" and has been used for its purported benefits in moistening the lungs, relieving cough, and reducing internal heat. Its juice and flesh are said to possess cooling and hydrating properties, which practitioners sometimes recommend for conditions involving inflammation or heat, including nephritis (kidney inflammation). The rationale in traditional contexts is that White Pear can help clear “heat” and promote fluid production, thereby alleviating symptoms related to nephritis such as thirst, dry mouth, and scanty urine.

However, scientific evidence supporting the efficacy of White Pear specifically for nephritis is very limited. While pears contain antioxidants, vitamins, and anti-inflammatory polyphenols, there are no robust clinical trials or pharmacological studies directly demonstrating its benefits for nephritis in humans. Existing modern literature may note its general health benefits and its role in hydration, but not targeted nephroprotective effects. Thus, its application for nephritis remains rooted in tradition rather than validated by rigorous scientific research.

In summary, White Pear is traditionally used for nephritis in TCM, but the evidence supporting its use is weak and primarily anecdotal or based on theoretical frameworks of traditional medicine rather than scientific validation.