Hello, child is 12 days old. Four days ago, there were small dots on t…

Hello, child is 12 days old. Four days ago, there were small dots on the face and neck. A day later, the arms. The pediatrician said to smear with levomethocarb solution. It doesn't help, what else can be done? How long does it usually take for this to pass? Is this an allergic reaction? The pediatrician is not answering during these weekend days.