PTSD (Post-Traumatic Stress Disorder) is a mental health condition that can develop after someone experiences, witnesses, or is exposed to an extremely frightening, distressing, or traumatic event.

It happens when the brain and nervous system continue to respond as though danger is still present, even when the traumatic event has ended.

PTSD is not a sign of weakness. It is a psychological response to trauma.

1. What can cause PTSD?

PTSD can develop after experiences such as:

• Physical, emotional or sexual abuse.

• Domestic violence.

• Childhood trauma or neglect.

• Serious accidents or injuries.

• War, violence or witnessing someone's death.

• Sudden loss of a loved one.

• Bullying, threats or prolonged intimidation.

• Medical trauma or life-threatening experiences.

Not everyone who experiences trauma develops PTSD.

2. Common symptoms of PTSD

PTSD symptoms are generally grouped into four categories.

1. Flashbacks and intrusive memories

• Reliving a traumatic experience as though it is happening again.

• Having unwanted memories.

According to formal diagnostic criteria (like the DSM-5), a person only needs to meet at least one symptom from the intrusion category to qualify for a diagnosis. [1, 2]

The presentation of these symptoms varies widely across individuals:

1. Different Combinations

A person might experience frequent, intense intrusive thoughts during the day but sleep soundly without any nightmares. Conversely, another person might only struggle with vivid distressing dreams but rarely experience daytime flashbacks. [1, 2, 3]

2. Flashbacks Vary in Type

Not everyone with PTSD experiences visual or "cinematic" flashbacks where they see the event play out like a video. Flashbacks can instead manifest as: [1]

• Somatic or physical flashbacks: Feeling the exact physical pain, pressure, or bodily sensations associated with the trauma.
• Emotional flashbacks: Experiencing a sudden, intense wave of the emotions felt during the trauma (such as overwhelming terror, despair, or helplessness) without any accompanying visual images or memories. [1, 2]

3. Other Forms of Re-experiencing

Intrusion can also present in ways not explicitly mentioned in your list, such as:

• Intense, prolonged psychological distress when exposed to a trigger (like a specific sound, smell, or anniversary).
• Strong physical reactions to reminders, such as a suddenly racing heart, sweating, shaking, or difficulty breathing. [1, 2, 3]

Ultimately, while the underlying mechanism of re-living the trauma is a core requirement for a PTSD diagnosis, the specific vehicle through which it happens varies from person to person.

• Experiencing nightmares.

• Feeling distressed when something reminds you of the trauma.

2. Avoidance

• Avoiding people, places or situations that trigger memories.

• Not wanting to talk about what happened.

• Keeping yourself emotionally or socially distant.

• Trying to suppress painful memories.

3. Changes in thoughts and emotions

• Feeling emotionally numb or disconnected.

• Struggling to trust people.

• Feeling guilty, ashamed or worthless.

• Losing interest in things you once enjoyed.

• Feeling constantly sad, anxious or angry.

• Finding it difficult to experience happiness or affection.

4. Being constantly on alert (hypervigilance)

• Feeling unsafe even when there is no obvious danger.

• Being easily startled.

• Struggling to relax.

• Having difficulty sleeping.

• Feeling irritated or angry quickly.

• Constantly watching your surroundings.

• Feeling like something bad is about to happen.

3. What does PTSD do to the brain?

PTSD can affect the way the brain processes fear, memories and danger.

Three important brain areas are involved:

• Amygdala: Helps detect danger. It can become overactive, making someone feel constantly threatened.

• Hippocampus: Helps organise memories and distinguish past experiences from the present. Trauma can disrupt this process.

• Prefrontal cortex: Helps regulate emotions and assess situations. Its ability to manage fear responses may be reduced.

This helps explain why someone with PTSD might intellectually know they are safe but still feel frightened.

Their nervous system may be reacting as if the danger is happening again.

4. How PTSD can affect relationships

PTSD can have a significant impact on relationships.

Someone experiencing PTSD might:

• Push people away even when they love them.

• Struggle to trust others.

• Become defensive when questioned.

• Interpret harmless situations as threatening.

• Find emotional intimacy difficult.

• Become easily overwhelmed by conflict.

• Need reassurance but struggle to ask for it.

• Withdraw or shut down during difficult conversations.

Sometimes, a person may desperately want love, safety and closeness but find it difficult to accept them.

This doesn't mean they don't care. Their trauma may affect how they experience emotional safety.

Importantly, PTSD can help explain certain behaviours, but it does not excuse abusive or harmful behaviour towards others.

5. Can PTSD be treated?

Yes — treatment can help significantly

PTSD is treatable, and many people experience substantial improvement.

Common treatments include:

• Trauma-focused CBT: Helps people process traumatic experiences and change unhelpful patterns of thinking.

• EMDR (Eye Movement Desensitisation and Reprocessing): Helps people process traumatic memories so they become less distressing.

• Medication: Certain antidepressants can help manage PTSD symptoms.

• Grounding techniques: Help bring attention back to the present when someone feels overwhelmed or experiences a flashback.

• Supportive relationships: Feeling understood, respected and safe can support recovery.

6. What PTSD can feel like emotionally

Imagine experiencing something frightening or painful.

The event ends, but afterwards:

• Your mind keeps returning to it.

• Your body remains tense.

• You struggle to trust that you're safe.

• Certain sounds, words or situations bring back intense emotions.

• You sometimes react strongly to things other people consider insignificant.

• You feel exhausted from constantly trying to keep yourself emotionally protected.

That is one way PTSD can affect someone.

The important thing to understand is that trauma doesn't always end when the event ends. Sometimes the emotional and physical effects continue long afterwards.