Post-Traumatic Stress Disorder (PTSD)
A mental health condition that may develop after combat, military trauma, life-threatening events, or other service-related traumatic experiences.
Mental & Behavioral- What causes PTSD?MedlinePlusMay 2026
PTSD develops after experiencing or witnessing a traumatic event, such as combat, a natural disaster, a car accident, sexual assault, or even the sudden death of a loved one. Your body's normal fear response gets stuck, and you continue to feel stressed and frightened long after the trauma is over.
- How does trauma affect my brain and body?MedlinePlusMay 2026
When you experience trauma, your body releases stress hormones and goes into "fight-or-flight" mode to protect itself. This causes changes like increased heart rate, blood pressure, breathing, and alertness. Most people recover naturally over time, but with PTSD, these stress responses stay activated.
- Can anyone get PTSD after a traumatic event?MedlinePlusMay 2026
Not everyone who experiences trauma develops PTSD—most people recover naturally on their own. Some people's brains and bodies get stuck in a stressed state after trauma, while others are able to process the event and move forward without long-term problems.
- Why do some people recover from trauma while others develop PTSD?MedlinePlusMay 2026
Researchers don't fully understand why some people develop PTSD and others don't, but factors like the severity of the trauma, your personal history, and how much support you have may play a role. Your brain chemistry and how you process fear also make a difference.
- Is there a timeline for when PTSD might start showing up?MedlinePlusMay 2026
PTSD symptoms can start right after a traumatic event or appear weeks or months later. Some people develop symptoms gradually, while others notice them suddenly—there's no set timeline for when PTSD shows up.