This is a purely informative post about Selective Mutism, a severe anxiety disorder no one knows and cares about. It is an unbelievably rare condition where a child or sometimes an adult is unable to speak in certain situations despite being capable of doing so due to severe unfathomable anxiety butterflies in their stomach.
Historically, it was known as elective mutism until the professionals realised how dreadfully awful that name is. Less than 1% of the population suffer from this condition at some point in their lives.
Selective Mutism is often misunderstood and misdiagnosed as autism spectrum disorder because of the professionals being unaware of the existence of SM which is absolutely absurd. Speaking of awareness, the UK is actually the only country in the world where there is some familiarity about SM among the general public. They even designated October as the Selective Mustism awareness month. Nice.
SM is generally very difficult to treat but symptoms can be alleviated greatly through Cognitive Behavioural Therapy and other forms of therapy. However, most children with SM are left untreated.
From the depths of everything, I could find one movie with a character with SM played by the powerful Kristen Stewart. The movie is Speak (2004) and although it doesn't have a fitting story for SM in partiular, it's still quite good in the depiction of the condition itself.