Several cultures have employed horsetail as a folk remedy for kidney and bladder troubles, arthritis, bleeding ulcers, and tuberculosis. The Chinese use it to cool fevers and as a remedy for eye inflammations such as conjunctivitis and corneal disorders, dysentery, flu, swellings and hemorrhoids.
Because of its content of silica, this plant is recommended when it is necessary for the body to repair bony tissues. Silica helps to fix calcium, so that the body can store more quantity of this mineral and then use it to repair bones, collagen and other body tissues. Horsetail can therefore be useful for Osteoporosis. Horsetail is also recommended for anemia and general debility. It has also been used to treat deep-seated lung damage such as tuberculosis or emphysema.
Horsetail is an astringent herb and has a diuretic action. It has an affinity for the urinary tract where it can be used to sooth inflammation, haemorrhaging, cystic ulceration, ulcers, cystitis and to treat infections. It is considered a specific remedy in cases of inflammation or benign enlargement of the prostate gland and is also used to quicken the removal of kidney stones.
Its toning and astringent action make it of value in the treatment of incontinence and bed-wetting in children. It may be applied to such conditions as urethritis or cystitis with haematuria, reducing haemorrhage and healing wounds thanks to the high silica content. This local astringent and anti-haemorrhagic effect explains the application of horsetail to such conditions as bleeding from the mouth, nose and vagina, its use to check diarrhoea, dysentery and bleeding from the bowel, and for slow-healing wounds, chilblains and conjunctivitis.