<unk>  is related to activation of the immune system, but its exact cause is unknown. Many inflammatory factors have been detected in<unk>  lesions, including IL-1alpha, IL-1beta, IL-8, and eotaxin. These molecules cause redness and swelling in the skin and attract immune cells. Eosinophils and other immune cells are found in the upper layer of the skin in<unk>  lesions. Immune cells tend to cluster around hair follicles in particular. The leading hypothesis about the cause of<unk>  is that bacteria activate the immune system when they enter hair follicles for the first time. This is part of a normal process in which bacteria from the environment start to grow on a baby's skin. It is unknown whether the immune response that causes<unk>  is helpful to the baby. Recent research indicates an association with Demodex mites infestation (demodicosis).
Erythema toxicum neonatorum
Papular eruption of blacks
Bradyphrenia
Prurigo gestationis
Erythema dyschromicum perstans
Noma neonatorum
Arbor vitae 
Cutis marmorata telangiectatica congenita