BURNS OF FIRST DEGREE
Pathology.
(1) Destruction of the cells of the horny layer.
(2) Injury of the cells of the mucous layer with an excess of lymph. No blistering.
(3) Congestion of the subpapillary plexus with some destruction of the hemoglobin.
(4) Closing of the ducts of the sweat and oil glands.
(5) Slight edema of the underlying dermis.
Clinical Stages.
1st stage—hyperemia and pain.
2nd stage—edema.
3rd stage—peeling and staining the skin.
4th stage—cells of the horny layer replaced by pushing upward of cells from stratum lucidum.