For example, a teenager in a car accident who broke his wrist and needed extensive surgery to save their arm may experience anxiety when driving in a car post-accident. PTSD can be diagnosed after a person experiences one or more intense and traumatic events and react with fear with complaints from three categorical symptoms lasting one month or longer. These categories are: re-experiencing the traumatic event, avoiding anything associated with the trauma, and increased symptoms of increased psychological arousal.[2]:555