This is dependent upon an altered condition of the nerves of the skin, and consists in a painful sensation of itching. There is no perceptible alteration in the appearance of the skin, and the itching is generally the result of sympathy, through the nerves, with some diseased condition of a distant part. It more frequently affects the fundament, the scrotum, or the vulva of females.
    TREATMENT. -- The following is usually all the treatment that is required: -- Take oleo-resin of lobelia, grs. xx; aconitin, grs. iij; sulphate of sanguinaria, grs. x; glycerine, 2/3 ij. Mix. Apply the ointment to the part three or four times a day. Lead-water and opium are also beneficial.