A child with Selective Mutism has specific situations in in which they find it impossible to speak. It is a recognised anxiety disorder - a true phobia of speaking in certain situations. Untreated, this can lead to wider mental health difficulties and can persist in to adulthood.
Thankfully, there is a recognised, well-evidenced approach to managing Selective Mutism, described in the Selective Mutism Resource Manual, an invaluable book for parents and professionals alike. I work with everyone involved in the child's care to ensure that everyone knows the right strategies and approaches to use to give the child the best possible support. Collaboration between home and nursery or school is vital, and a key part of my role is co-ordinating and developing this.