★ PTSDIY · Field Manual ★ Part I ★
Chapter 04
Mapping your symptoms
Know what you're working with
FM 04-MAP-101Read time 8 min
4-1.Mission brief
PTSD is not just flashbacks. Clinicians group its symptoms into four clusters, and many people only recognize one of them. Knowing your map tells you which tools to reach for first.
4-2.The four clusters
| Cluster | What it looks like | Start with |
|---|---|---|
| Intrusion | Flashbacks, nightmares, unwanted memories, strong reactions to reminders. | Ch. 5, 13 |
| Avoidance | Steering clear of people, places, conversations or thoughts tied to the event. | Ch. 7, 18 |
| Mood & thinking | Blame, guilt, numbness, detachment, trouble feeling good things, gaps in memory. | Ch. 17, 21 |
| Arousal | Hypervigilance, startle, irritability, poor sleep, poor focus, reckless behavior. | Ch. 6, 10, 13 |
A diagnosis requires symptoms lasting more than a month and getting in the way of life. Only a clinician can make it.
4-3.Related terrain
| Condition | What to know |
|---|---|
| Complex PTSD | Follows prolonged or repeated trauma. Adds struggles with emotional control, self-worth and relationships. |
| Moral injury | Doing, witnessing or failing to prevent something that violates your moral code. Guilt, shame, betrayal. Not a diagnosis, but very real. |
| TBI | Concussion and brain injury share symptoms with PTSD: focus, irritability, sleep. Get screened if you had blast or head exposure. |
| Depression | Often rides alongside PTSD. Treating one often helps the other. |
| Substance use | Alcohol and drugs as self-medication. Common, understandable, and treatable alongside PTSD. |
4-4.Field procedures — build your map
| 01 | Take the PCL-5A free 20-item checklist from the VA's National Center for PTSD. Score it and write the number down. | 10 min |
| 02 | Log for two weeksEach day: what hit, when, how hard (0–10), and what helped. | 2 min/day |
| 03 | Find your heaviest clusterMatch your log to the four clusters. That's where you start. | 5 min |
| 04 | Bring it to a providerYour score and log make a first appointment twice as useful. | — |
Operator note — A screener is not a diagnosis. It's a map to hand to someone qualified to read it.
4-5.Common faults & corrections
| ✕ | Fault: "No flashbacks, so it's not PTSD"Correction: Avoidance and numbness count. Some people's PTSD is mostly quiet. |
| ✕ | Fault: "It's been too long to matter"Correction: PTSD can show up years later, and treatment works decades after the event. |
Companion episode — [IN PROGRESS]
PTSDIY · FM 04-MAP-101 · Part I04