Seborrhea - disturbance of function of the sebaceous glands, described mainly strengthened allocation of defective dermal bacon. The major importance has the lowered maintenance of free lowest fat acids due to augmentation of a cholesterin and free maximum fat acids that reduces bacteriostatic properties of a skin and promotes development of a secondary infection. The etiology is unknown.

Pathogenesis: functional nervous endocrine disturbances, in particular a vegetative dystonia. Endocrine shifts are expressed in disturbance of a parity between androgens and estrogens (rising of a level of androgens at depression of estrogens). Probably, nervous endocrine disturbances at a seborrhea are caused by a primary subthalamic or cortical pathology as the phenomena of a seborrhea are usually sharply expressed at encephalitises, diencephalic frustration. The seborrhea amplifies from acute, salty and sweet nutrition.

Clinical picture. The seborrhea can develop on any site of a skin where there are sebaceous glands, but usually it arises there where especially it is a lot of sebaceous glands and where they have the greatest size: on a pilar part of a head, the face, a breast and a back. Displays of a seborrhea are precisely enough characterized by the term « a sebaceous skin »: the amazed sites are represented wet, sebaceous, have characteristic shine. Pores of sebaceous glands are dilated, quite often corked by dark fuses (comedoes, « black acnes »). A skin it becomes frequent more thickly, gets a is rather dirty-grey shade. All this gives to a skin similarity to an orange or citric cuticle. Hair sebaceous, the seborrheal alopecia is marked. Quite often there are sebaceous cysts in the form of fine желтовато-white nodules. Depending on prevalence of those or other signs distinguish a liquid (fat) and dense (dry) seborrhea. The seborrhea often becomes complicated a dandruff and vulgar acnes. Dandruff - a diffusive ecdysis of a skin of a pilar part of the head, usually not accompanied the inflammatory phenomena.