Couchgrass may be used in urinary infections such as cystitis, urethritis and prostatitis. Its demulcent properties soothe irritation and inflammation. It is of value in the treatment of enlarged prostate glands. It may also be used in kidney stones and gravel. As a tonic diuretic, Couchgrass has been used with other herbs in the treatment of rheumatism. The New Holistic Herbal by David Hoffmann Pg. 193