The cause of<unk>  is not known for certain. Research into higher occurrence in boys rather than girls imply that higher than normal levels of testicular androgens can cause increased sebaceous gland secretions. During the first 6–12 months of age, there is increased sebum production stimulated by luteinizing hormone (LH) and testosterone of testicular origin that stops after this period until adrenarche. Girls do not experience this. Genetics and family history play a role in influencing sebaceous gland size and activity, pore size and inflammation that can increase risk of onset and presentation of<unk> . It is suggested that the fetal adrenal gland along with testicular androgen could be the cause of<unk> . During the neonatal period, there is increased sebum production through an enlarged zona reticularis (an androgen producing area) on the fetal adrenal gland that gradually decreases to very low levels at around 1 years of age, coinciding with when<unk>  tends to resolve. The fetal adrenal gland produces androgens such as dehydroepiandrosterone (DHEA) and dehydroepiandrosterone sulfate (DHEAS) that stimulate sebaceous glands.
Infantile acne
Pomade acne
Neonatal acne
Feline acne
Tropical acne
Acne cosmetica
Occupational acne
Ichthyosis vulgaris