A steatoma is a cyst of the sebaceous gland and duct, produced by retained secretion. The contents may be hard and friable, soft and cheesy, or even fluid, of a grayish, whitish or yellowish color, and with or without a fetid odor; the mass consisting of fat-drops, epidermic cells, cholesterin, and sometimes hairs. #Are sebaceous cysts likely to be confounded with gummata?# No. Gummata grow more rapidly, are usually painful to the touch, are not freely movable, and tend to break down and ulcerate. #Describe the treatment of steatoma.# A linear incision is made, and the mass and enveloping sac dissected out. If the sac is permitted to remain, reproduction almost invariably takes place. #CLASS II.--INFLAMMATIONS.# #Erythema Simplex.# #What do you understand by erythema simplex?# Erythema simplex is a hyperaemic disorder characterized by redness, occurring in the form of variously-sized and shaped, diffused or circumscribed, non-elevated patches. #Name the two general classes into which the simple erythemata are divided.# Idiopathic and symptomatic. #What do you include in the idiopathic class?# Those erythemas due to external causes, such as cold and heat (_erythema caloricum_), the action of the sun (_erythema solare_), traumatism (_erythema traumaticum_), and the various poisons or chemical irritants (_erythema venenatum_). #What do you include in the symptomatic class?# Those rashes often preceding or accompanying certain of the systemic diseases, and those due to disorders of the digestive tract, stomachic and intestinal toxins, to the ingestion of certain drugs, and to use of the therapeutic serums. #Describe the symptoms of erythema simplex.# The essential symptom is redness--simple hyperaemia--without elevation or infiltration, disappearing under pressure, and sometimes attended by slight heat or burning; it may be patchy or diffused. In the idiopathic class, if the cause is continued, dermatitis may result. #What is to be said about the distribution of the simple erythemata?# The idiopathic rashes, as inferred from the nature of the causes, are usually limited. The symptomatic erythemas are more or less generalized; desquamation sometimes follows. #Describe the treatment of the simple erythemata.# A removal of the cause in idiopathic rashes is all that is needed, the erythema sooner or later subsiding. The same may be stated of the symptomatic erythemata, but in these there is at times difficulty in recognizing the etiological factor; constitutional treatment, if necessary, is to be based upon general principles. Intestinal antiseptics are useful in some instances. Local treatment, which is rarely needed, consists of the use of dusting-powders or mild cooling and astringent lotions, such as are employed in the treatment of acute eczema (q. v.). #Erythema Intertrigo.# (_Synonym:_ Chafing.)