My son is suffering from intertrigo under his armpits. Is it better to thoroughly dry the affected area with baby powder or zinc oxide ointment?

It is best to dry the affected area under the armpits with zinc cream rather than baby powder. Avoid using tight pajamas and allow the area to breathe as much as possible. Consider consulting a doctor if the situation does not improve with these tips or worsens. Use an antifungal cream if there is a Candida infection, and don't try to completely remove the zinc cream during bathing.