Post-traumatic stress disorder (PTSD) is a mental health condition triggered by experiencing or witnessing an extremely stressful or frightening event. Common symptoms include flashbacks, nightmares, severe anxiety, and intrusive thoughts related to the event. 

Many people who go through traumatic experiences may struggle to adjust and cope initially. However, with time and self-care, most individuals begin to recover. If symptoms worsen, persist for months or years, and interfere with daily functioning, the individual may be suffering from PTSD. 

Early treatment can be crucial in alleviating symptoms and improving overall functioning. 

Symptoms 
PTSD symptoms can begin within three months of a traumatic event, but in some cases, they may not emerge until years later. PTSD symptoms are typically categorized into four groups: intrusive memories, avoidance, negative changes in thinking and mood, and changes in physical and emotional reactions. The intensity and nature of symptoms can change over time or differ from person to person. 

Intrusive Memories 
These symptoms may include: 

• Recurrent, unwanted distressing memories of the traumatic event 
• Flashbacks—reliving the trauma as if it were happening again 
• Disturbing dreams or nightmares about the event 
• Intense emotional or physical distress when reminded of the trauma 

Avoidance 
Avoidance symptoms may include: 

• Avoiding thoughts, discussions, or feelings about the traumatic event 
• Steering clear of places, activities, or people that are reminders of the trauma 

Negative Changes in Thinking and Mood 
These symptoms may involve: 

• Persistent negative beliefs about oneself, others, or the world 
• Lasting feelings of fear, guilt, shame, anger, or blame 
• Difficulty remembering important details of the traumatic experience 
• Feeling detached from family and friends 
• Loss of interest in previously enjoyed activities 
• Trouble experiencing positive emotions 
• Feeling emotionally numb 

Changes in Physical and Emotional Reactions 
Also known as arousal symptoms, these can include: 

• Being easily startled or constantly on alert for danger 
• Engaging in risky or self-destructive behavior, such as substance abuse or reckless driving 
• Sleep disturbances 
• Difficulty concentrating 
• Irritability, angry outbursts, or aggressive behavior 
• Physical symptoms like sweating, rapid heartbeat, rapid breathing, or trembling 

For Children Aged 6 and Younger, symptoms may also include: 

• Acting out the traumatic event or parts of it during play 
• Having frightening dreams, which may or may not contain recognizable elements of the trauma 

Symptom Intensity 
The severity of PTSD symptoms can fluctuate. Symptoms may become more intense during periods of general stress or when confronted with reminders of the traumatic event, such as anniversaries or triggering sights and sounds. For instance, hearing a car backfire might bring back combat memories, or seeing news coverage of an assault could trigger emotional distress tied to a personal experience. 

When to See a Mental Health Professional 
If distressing thoughts and emotions related to a traumatic experience persist for over a month—especially if they are severe—or if you're finding it difficult to regain control of your life, consult a healthcare provider or mental health professional. Seeking treatment promptly can help prevent symptoms from becoming more severe.