The custom formerly prevailing in Poland of shaving the heads of children, neglect of cleanliness, the heat of the head-dress, and the exposure of the skin to cold seem to favor the production of this disease. Plica began after an attack of acute fever, with pains like those of acute rheumatism in the head and extremities, and possibly vertigo, tinnitus aurium, ophthalmia, or coryza.

The varieties of the disturbances of the functions of the ear range from tinnitus aurium to congestion causing complete deafness. The gastro-intestinal and genito-urinary tracts are especially disposed to untoward action by quinin. There is a case recorded in which, after the slightest dose of quinin, tingling and burning at the meatus urinarius were experienced.

Causon was due to putrefaction of bile in the smaller vessels of the heart, diaphragm, stomach or liver, and was an acute fever characterized by furred tongue, intolerable frontal headache, tinnitus aurium, constant thirst, delirium, an olive-colored face, redness and twitching of the eyes and a full, frequent and rapid pulse.

Kauffmann reports a case of what he calls objective tinnitus aurium, in which the noise originating in the patient's ears was distinctly audible by others. The patient was a boy of fourteen, who had fallen on the back of his head and had remained unconscious for nearly two weeks. The noises were bilateral, but more distinct on the left than on the right side.

A curious phenomenon in this disease is that the patient can use the legs perfectly well lying in bed. The prognosis seems to be favorable. Meniere's disease is a disease probably of the semicircular canals, characterized by nausea, vomiting, vertigo, deafness, tinnitus aurium, and various other phenomena. It is also called aural or auditory vertigo.