If every time Martha gets on a subway she starts to shake and feel afraid because she has already been mugged on the subway, this is a trigger for her.
It corresponds to a mental and emotional stimulus that relates to a past experience that generated some trauma in the individual. They are usually related to Post-Traumatic Stress Disorder, and can be difficult to identify, as a trigger will not always be a direct reminder of the trauma.
Therefore, it is essential that the individual seeks psychotherapeutic help when identifying symptoms generated by a trigger, in order to overcome the trauma and this does not interfere with their daily activities.
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