Can you please tell me who knows ??? Can these pimples testify to any …

Can you please tell me who knows ??? Can these pimples testify to any allergies to anything? There's only on the neck, slightly red with a white head on the chin, and on the cheeks but much lighter, or is it acne of newborns or miliaria? The baby in general doesn't bother at all, maybe the belly just a little bit.