If he really has acne
, you have to make sure he is not exposed to too much male hormone
, either from his own body or from outside sources, such as a grandparent's hormone cream. Is he having other signs of puberty
, such as a growth spurt
, axillary or pubic hair
, body odor
, etc? I would visit your pediatrician to make sure the lesions are truly acne, and if so, why he has it.