Juniper Berries make an excellent antiseptic in conditions such as cystitis. The essential oil present is quite stimulating to the kidney nephrons and so this herb should be avoided in kidney disease. The bitter action aids digestion and eases flatulent colic. It is used in rheumatism and arthritis. Externally it eases pain in the joints or muscles. The New Holistic Herbal by David Hoffmann Pg. 209