During nursing the nipples assume a deep black color which disappears after weaning. Le Cat speaks of a woman of thirty years, whose forehead assumed a dusky hue of the color of iron rust when she was pregnant about the seventh month. By degrees the whole face became black except the eyes and the edges of the lips, which retained their natural color. On some days this hue was deeper than on others; the woman being naturally of a very fair complexion had the appearance of an alabaster figure with a black marble head. Her hair, which was naturally exceedingly dark, appeared coarser and blacker. She did not suffer from headache, and her appetite was good. After becoming black, the face was very tender to the touch. The black color disappeared two days after her accouchement, and following a profuse perspiration by which the sheets were stained black. Her child was of a natural color. In the following pregnancy, and even in the third, the same phenomenon reappeared in the course of the seventh month; in the eighth month it disappeared, but in the ninth month this woman became the subject of convulsions, of which she had one each day. The existence of accidental nigrities rests on well-established facts which are distinctly different from the pigmentation of purpura, icterus, or that produced by metallic salts. Chomel quotes the case of a very apathic old soldier, whose skin, without any appreciable cause, became as brown as that of a negro in some parts, and a yellowish-brown in others. Rustin has published the case of a woman of seventy who became as black as a negress in a single night. Goodwin relates the case of an old maiden lady whose complexion up to the age of twenty-one was of ordinary whiteness, but then became as black as that of an African. Wells and Rayer have also published accounts of cases of accidental nigrities. One of the latter cases was a sailor of sixty-three who suffered from general nigrities, and the other was in a woman of thirty, appearing after weaning and amenorrhea.
Mitchell Bruce has described an anomalous discoloration of the skin and mucous membranes resembling that produced by silver or cyanosis. The patient, a harness-maker of forty-seven, was affected generally over the body, but particularly in the face, hands, and feet. The conjunctival, nasal, and aural mucosa were all involved. The skin felt warm, and pressure did not influence the discoloration. The pains complained of were of an intermittent, burning, shooting character, chiefly in the epigastric and left lumbar regions. The general health was good, and motion and sensation were normal. Nothing abnormal was discovered in connection with the abdominal and thoracic examinations. The pains and discoloration had commenced two years before his admission, since which time the skin had been deepening in tint. He remained under observation for three months without obvious change in his symptoms. There was nothing in the patient's occupation to account for the discoloration. A year and a half previously he had taken medicine for his pains, but its nature could not be discovered. He had had syphilis.
Galtier mentions congenital and bronze spots of the skin. A man born in Switzerland the latter part of the last century, calling himself Joseph Galart, attracted the attention of the curious by exhibiting himself under the name of the "Living Angel." He presented the following appearance: The skin of the whole posterior part of the trunk, from the nape of the neck to the loins, was of a bronze color. This color extended over the shoulders and the sides of the neck, and this part was covered with hairs of great fineness and growing very thick; the skin of the rest of the body was of the usual whiteness. Those parts were the darkest which were the most covered with hair; on the back there was a space of an inch in diameter, which had preserved its whiteness, and where the hairs were fewer in number, darker at their bases, and surrounded by a very small black circle; the hair was thinner at the sides of the neck; there were a great many individual hairs surrounded by circles of coloring matter;but there were also many which presented nothing of this colored areola. In some places the general dark color of the skin blended with the areola surrounding the roots of the hair, so that one uniform black surface resulted. In many places the dark color changed into black. The irides were brown. The man was of very unstable character, extremely undecided in all his undertakings, and had a lively but silly expression of countenance. A distinct smell, as of mice, with a mixture of a garlicky odor, was emitted from those parts where the excessive secretion of the coloring matter took place. In those places the heat was also greater than natural. Rayer recites the case of a young man whom he saw, whose eyelids and adjacent parts of the cheeks were of a bluish tint, similar to that which is produced on the skin by the explosion of gunpowder.