In this disease Hebra advises that the affected hairs should be pulled out, and then a paste containing sulphur, glycerin, and alcohol, in equal parts, should be rubbed over the diseased skin every night and morning; by this means a cure is rapidly effected, but it is rather severe treatment. It is especially adapted for the parasitic form, but is useful also in the more common one, because sulphur, as well as sulphides, lessens pus-formations.