English Plantain (Plantago lanceolata) has a long history of use in traditional herbal medicine systems, especially in Europe and parts of Asia. Traditionally, the leaves and seeds have been used as remedies for a variety of ailments, including respiratory issues, wounds, and urinary tract problems. Its use for kidney infections specifically is rooted in folk medicine, where it was believed to possess mild diuretic, anti-inflammatory, and soothing effects on the urinary tract. Herbalists sometimes recommended plantain infusions to support urinary health and to help flush out minor infections, although the evidence for effectiveness in treating actual kidney infections (pyelonephritis) is very limited.

Scientifically, there is scant evidence supporting its use for kidney infections. Some laboratory studies have identified anti-inflammatory and antimicrobial compounds in Plantago lanceolata, but these have not been studied in clinical settings specifically for kidney infection. No controlled human trials have evaluated its efficacy or safety for this condition. Modern clinical guidelines for kidney infections recommend antibiotics as the standard of care, and serious kidney infections can be life-threatening if not properly treated. Thus, while there is traditional usage, it is not substantiated by strong scientific evidence.

In summary, English Plantain is used in traditional medicine for urinary complaints, but there is minimal scientific validation for its use in treating kidney infections.