It is believed that maternal androgens passed to the infant through the placenta has a role in stimulating sebaceous glands leading to increased sebum production that causes comedone formation. Dehydroepiandrosterone (DHEA) produced from the fetal adrenal gland and androgen production from<unk>  testicles may also stimulate sebum production from sebaceous glands. The role of genetics is unclear but a positive family history supports association with<unk> . Some researchers suggest the role of Malassezia colonization causing hypersensitivity reactions in skin but this tends to be linked to<unk>  cephalic pustulosis more so than<unk> .
Neonatal acne
Infantile acne
Papular eruption of blacks
Arbor vitae 
Pomade acne
Tinea imbricata
Woolly hair nevus
Linea alba 