Yes, it is possible for an adult to become mute as a result of psychological trauma. Selective mutism is a condition where a person, typically a child, consistently fails to speak in specific social situations despite being capable of speech in other settings. However, in some rare cases, adults can also experience a similar reaction as a response to trauma, resulting in what is sometimes referred to as "acquired" or "adult-onset" mutism.
Acute stress, severe anxiety, or traumatic experiences can overwhelm a person's ability to express themselves verbally. They may feel a sense of helplessness or fear, leading them to withdraw from communication and choose not to speak. This response is often seen as a coping mechanism to protect oneself from perceived threats or emotional distress.
It is essential to note that adult mutism due to trauma is usually a symptom of an underlying psychological issue and should be taken seriously. If someone you know is experiencing mutism or any other distressing psychological symptoms after a traumatic event, it is crucial to encourage them to seek professional help from a mental health specialist, such as a psychologist or psychiatrist, who can provide appropriate assessment, support, and treatment. Therapy and counseling can be beneficial in helping individuals process their trauma, manage their emotions, and gradually regain their ability to communicate effectively.