Diagnosis is based on presentation of comedones primarily on the face of an infant of 6–12 months of age. Severity can be mild, moderate or severe and can be determined from the presence and distribution of comedones and inflammatory lesions such as papules and nodules. A physical may be followed up next with particular attention paid to signs of an endocrine disorder including normal growth and weight, testicular growth, breast development, hirsutism or growth of pubic hair. Hormonal workup may not be necessary unless one of these abnormalities is present, then work up of testosterone, DHEA, DHEAS, LH and FSH or referral to a pediatric endocrinologist specialist may be recommended. Differential diagnosis It is important to differentiate<unk>  from other forms of acneiform eruptions. Acne venenata infantum is a form of acne characterized by comedone formation and induced by chemical irritants on the skin. This can include comedogenic products such as lotions, ointments, creams and oils. Upon discontinuation of these products, lesions will heal within 6–8 weeks. Other conditions that should be considered include periorificial dermatitis, keratosis pilaris, sebaceous hyperplasia and infections. Pyodermas and panniculitis should be considered in severe cases of inflammatory acne or in cases of acne conglobata while hyperandrogenism should be ruled out in cases of persistent<unk> .
Infantile acne
Pomade acne
Neonatal acne
Feline acne
Tropical acne
Acne cosmetica
Occupational acne
Ichthyosis vulgaris