A. That really isn't an age when kids get acne, so it is likely something else. It is more typical to have acne in the newborn period (neonatal acne) and then, later on, once puberty starts.
It is hard to tell without looking at the rash, but what you are describing could be keratosis pilaris. Does it look like this picture of keratosis pilaris on a child's cheek? Or this close up picture of keratosis pilaris?
Keratosis pilaris is a common rash that often occurs on a child's cheeks, upper arms, and thighs. It often is worse in the winter, when a child's skin will feel rough and dry with small red bumps.
Although treatment isn't always necessary, it may help to use a moisturizer like Eucerin Plus or LacHydrin. Even with proper treatment, you can expect it to come back at times.

