Following a motor vehicle crash, some people will experience high levels of emotional distress, which might be associated with the reactions to and memories of the accident, physical injury, changes to work, life and family, and associated with the compensation process. Most people will recover without any significant or ongoing psychological problems. But for some, this distress will develop into a mental health disorder such as post-traumatic stress disorder, anxiety disorder, adjustment disorder, and major depressive disorder. Each of these conditions is described briefly in this section. Treatments supported by scientific evidence for the management of these mental health conditions are also described.