trigger is a psychological term for an external circumstance that produces negative emotional or psychiatric symptoms. Those symptoms are usually anxiety, panic, despair, stress, and negative self-talk.
Often it is a stimulus, such as smell, sound, or sight, that reminds people of past trauma.Triggers often cause flashbacks of traumatic situations.
This might cause someone to lose track of their surroundings and relive the traumatic event. ADVERTISEMENTTriggers can take many forms, some predictable, some less intuitive.