Chervil has been used in the past as a diuretic, expectorant, digestive aid, and skin freshener.  It was also thought to relieve symptoms of eczema, gout, kidney stones, and pleurisy.  It is most widely known as a remedy for high blood pressure today.  Make a tea, keeping a tight cover on the cup or pot to trap the volatile oils.  The leaves can also be dried and pulverized into a powder to be used in Capsule form.  This tea can also be used as an eye wash by saturating a cotton ball and placing it over the closed eye for 10 minutes. 

Tender, young Chervil leaves have been used in spring tonics throughout history.  A combination of Dandelion, Watercress, and Chervil are still recommended today for rejuvenation of the blood and body after a long winter.