A variety of metabolic, immune, endocrine and vascular changes cause the skin diseases in pregnant women, but also on their skin often occur some changes. The skin changes and diseases that occur during pregnancy can be divided into: - Physiological changes - Non-specific alterations (dermatoses affected by pregnancy) - Dermatoses specific to pregnancy. Physiological changes during pregnancy are the changes of: pigmentation (hyperpigmentation, melasma), the hair (hirsutism, postpartum telogen effluvium, alopecia postpartum), the nails (subungvalne hyperkeratosis, distal onycholysis, transverse puncture, brittleness), the glands (increased ekrina function, increased sebaceous function, decreased apocrine function), connective tissue (striae), mucous membranes (gingivitis) and vascular changes ("spider" telangiectasia, palmar erythema, edema lower legs, eyelids and face, varicose veins, hemorrhoids). Non-specific changes (dermatoses affected by pregnancy) divided into infectious diseases (viral, bacterial and fungal), autoimmune conditions (systemic lupus erythematosus, polymyositis / dermatomyositis and pemphigus vulgaris), metabolic disease (porphyria cutanea tarda and acrodermatitis enteropathica), disorders of connective tissue (Ehlers-Danlos syndrome and pseudoxanthoma elasticum), and other (neurofibromatosis, malignant melanoma and erythema nodosum gravidarum). Dermatoses specific to pregnancy are pemphigoid gestationis, polymorphic eruption of pregnancy, recurrent cholestasis of pregnancy, complex disease called atopic eruption of pregnancy (composed of eczema in pregnancy / atopic dermatitis, prurigo of pregnancy and folliculitis pruritica), and these two diseases which are extremely rare occurring during pregnancy (impetigo herpetiformis and gestational autoimmune progesterone dermatitis).