The invention discloses a tincture and a preparation method thereof for treating
prurigo nodularis, which is made of the following materials by weight proportions: 30-10 portions of cortex dictamni, 30-10 portions of khosam, 30-10 portions of selinum, 30-10 portions of
broom cypress fruit, 30-10 portions of gallnut, 30-10 portions of red paeonia, 30-10 portions of trigone, 30-10 portions of rhizoma zedoariae, 30-10 portions of white caltrop, 30-10 portions of parsnip, 1200-400 portions of 75 percent
alcohol. The preparation method is to soak the cortex dictamni, the khosam, the selinum, the
broom cypress fruit, the gallnut, the red paeonia, the trigone, the rhizoma zedoariae, the white caltrop, and the parsnip in the 75 percent
alcohol for ten days, and then to filter the
medicine dregs; the obtained filtrate is the tincture for treating
prurigo nodularis. The tincture has the beneficial effects that the tincture is pure herbal external tincture, can reduce damp fever, remove cold and stop itch, withdraw acerbity and dispel
tubercle; can cure the
prurigo nodularis effectively without
side effect, and can be used conveniently.