Corns

These are composed of an accumulation of the cells of the horny layer, which, generally, are pressed together into a conical mass that dips deeply downwards. The papillae beneath may be enlarged, but are usually atrophied. The corn mass presses even upon the rete cells, and it also obliterates more or less the sweat glands. Corns are caused by pressure and friction; they are of two kinds - the hard ordinary corns, and soft corns. The soft corns occur between the toes, and being saturated with the secretion of the part, are moist and soft; generally there is some serosity effused under the upper layers or the bursae normally found at the parts over the joints of the toes where the corns form, enlarge and pour out fluid, which is discharged from a little central aperture.