What Is the Difference Between PTSD and Trauma?

Trauma refers broadly to the psychological and emotional impact of an experience that overwhelms a person's ability to cope.
Not everyone who experiences trauma develops post-traumatic stress disorder, or PTSD.
PTSD is a specific mental-health condition involving a pattern of symptoms that may include intrusive memories, avoidance, changes in mood and thinking, and increased physical or emotional arousal.
Someone can experience significant trauma-related difficulties without necessarily meeting diagnostic criteria for PTSD.
If you believe you may have PTSD, a suitable healthcare or mental-health professional can provide appropriate assessment and guidance.