And lactic acid, with from five to twenty parts of water; and an ointment containing a drachm each of bismuth subnitrate and white precipitate to the ounce. Hydrogen peroxide occasionally acts well. Trichloracetic acid, usually weakened with one or two parts water, may be cautiously tried. The application of a strong alcoholic solution of resorcin, twenty to fifty per cent. strength, is also valuable, as is also a two to ten per cent. alcoholic solution of salicylic acid.
(Applications are made two or three times daily, and as soon as slight scaliness or irritation is produced are to be discontinued for one or two days.)
Tattoo-marks are difficult to remove. Excision is the surest method. Electrolysis, applying the needle at various points, somewhat close together, and using a fairly strong current—three to eight milliampères—will exceptionally, especially when repeated several times, produce a reactive inflammation and casting-off of the tissue containing the pigment; a scar is left.
Several writers claim good results with glycerole of papain, pricking it in in the same manner as in tattooing.
Gun-powder marks. If recent, but a day or so after their occurrence, the larger specks may be picked or scraped out. Later, electrolysis, using a fairly strong current, may result in their removal. Their removal may also be satisfactorily effected with a minute cutaneous trephine.
Keratosis Pilaris.
(Synonyms: Pityriasis Pilaris; Lichen Pilaris.)
What is meant by keratosis pilaris?
Keratosis pilaris may be defined as a hypertrophic affection characterized by the formation of pin-head-sized, conical, epidermic elevations seated about the apertures of the hair follicles.
Describe the clinical appearances of keratosis pilaris.