Selective mutism

Selective mutism is a mental disorder that mainly occurs in children. Children with selective mutism are unable to speak under certain conditions, even though their speech is normally developed and their speech organs are intact.
The child only speaks to certain people, such as their parents. When in contact with other people, however, it remains mute. Selective mutism goes beyond normal shyness. Even after a longer period of acclimatization, for example in kindergarten, the affected children remain mute.
A typical example: the child chats away at home, but has not made a sound in kindergarten for months. It is important to note that selective mutism can be seen as a manifestation of an anxiety disorder