From a new research article, Corona children studies "Co-Ki": First results of a Germany-wide registry on mouth and nose covering (mask) in children, by Silke Schwarz, Ekkehart Jenetzky, Hanno Krafft, Tobias Maurer, David Martin:

Narratives about complaints in children and adolescents caused by wearing a mask are accumulating...

 In this publication we report the results from the parents, who entered data on a total of 25,930 children. The average wearing time of the mask was 270 minutes per day.  Impairments caused by wearing the mask were reported by 68% of the parents. These included irritability (60%), headache (53%), difficulty concentrating (50%), less happiness (49%), reluctance to go to school/kindergarten (44%), malaise (42%) impaired learning (38%) and drowsiness or fatigue (37%)...

 While the proportion of people tested positive for SARS-CoV-2 and also the number of intensive care patients in Germany is high in many places, we report here on a relatively small, unrepresentative problem: several thousand children who seem to suffer from wearing the mask or who may experience health problems from the mask. Our study provides the basis for a representative survey on which a precise benefit-risk analysis of mask wearing in children can be built...

A precise benefit-risk analysis is urgently required. The occurrence of reported side effects in children due to wearing the masks must be taken seriously and requires a precise clarification of the accompanying health circumstances, the situation of wearing the mask (duration, breaks and mask type) and the school situation.