Final answer:
Infantile acne appears in babies as small pimples, while juvenile acne occurs in young children prior to puberty. Both conditions are due to excess sebum production clogging pores, leading to bacterial infection. These are treatable but should be monitored by healthcare professionals.
Step-by-step explanation:
Infantile and juvenile acne are types of acne that appear in younger age groups. Infantile acne can occur in newborns and is typically seen as small pimples on the baby's skin. Juvenile acne, on the other hand, refers to acne that occurs in children who are a bit older, before the typical age of the onset of puberty-related acne. While acne is often associated with the hormonal changes that occur during adolescence, it can manifest in infants and children as well, albeit less commonly.
The excess production of sebum by sebaceous glands, potentially stimulated by hormones, can lead to the clogging of pores, which, combined with dead skin cells, creates an environment for bacteria such as Propionibacterium and Staphylococcus to infect and ultimately cause acne. Although infantile and juvenile acne are relatively rare compared to adolescent acne, they are treatable conditions that should be monitored by a healthcare professional to prevent potential scarring.