5.1 Wound Pain Assessment
Key Takeaways
- Wound pain is assessed by type (nociceptive vs. neuropathic), timing (background pain vs. procedural pain during dressing changes or debridement), intensity, quality, and effect on function, sleep, and adherence.
- Use a tool that fits the patient: a 0–10 numeric rating scale or 100-mm visual analog scale for most adults, the Wong-Baker FACES scale for young children, FLACC for preverbal or nonverbal children, and PAINAD for adults with advanced dementia.
- Pain character points to etiology: ischemic rest pain worsens with elevation and at night and improves with dependency, venous pain aches and improves with elevation, and pain out of proportion suggests pyoderma gangrenosum, calciphylaxis, vasculitis, or necrotizing infection.
- New or increasing pain in a previously painless neuropathic foot ulcer is a warning sign of infection, deep abscess, or acute Charcot neuroarthropathy.
- Procedural pain is reduced by premedicating so that the analgesic peaks during care, applying topical anesthetics such as lidocaine-prilocaine cream for about 30 to 60 minutes before debridement, using atraumatic dressings, and allowing patient-controlled pauses.
5.1 Wound Pain Assessment
Core Clinical Principle: Pain is both a symptom to treat and a diagnostic clue. Measuring it consistently, separating background pain from procedural pain, and noticing when the pattern changes lets you treat suffering, improve adherence, and catch ischemia, infection, and atypical wounds early.
The CWSP outline lists pain assessment as its own topic in the Assessment and Diagnosis domain, and managing analgesic medications appears among the treatment tasks. Untreated wound pain disrupts sleep and mobility, raises stress hormones that impair healing, and makes patients avoid dressing changes and offloading devices.
Types of Wound Pain
| Dimension | Categories | What to Ask or Look For |
|---|---|---|
| Mechanism | Nociceptive (tissue injury and inflammation: aching, throbbing, tender) vs. neuropathic (nerve damage: burning, shooting, electric, tingling, allodynia) | Descriptors, sensory exam, response to touch of the periwound skin |
| Timing | Background (present at rest), incident (with movement or coughing), procedural (dressing removal, cleansing, debridement), operative (after surgery) | When it starts, how long it lasts after care, what worsens or relieves it |
| Course | Acute vs. chronic (commonly more than 3 months); cyclic (recurs with each dressing change) vs. noncyclic (a single procedure) | Pattern over days and weeks |
A structured history covers onset, provocation and palliation, quality, region and radiation, severity, and timing (OPQRST), plus the effect on sleep, mood, function, and willingness to follow the care plan.
Choosing a Pain Scale
| Tool | Population | How It Works |
|---|---|---|
| Numeric Rating Scale (NRS) | Most adults | 0 (no pain) to 10 (worst imaginable); easy to repeat before and after care |
| Visual Analog Scale (VAS) | Adults able to mark a line | Mark on a 100-mm line; distance in millimeters is the score |
| Verbal descriptor scale | Older adults, low numeracy | None, mild, moderate, severe |
| Wong-Baker FACES | Children about 3 years and older; some adults | Six faces from no hurt to hurts worst |
| FLACC | Preverbal or nonverbal children (roughly 2 months to 7 years) | Face, Legs, Activity, Cry, Consolability, each 0–2 (total 0–10) |
| PAINAD | Adults with advanced dementia | Breathing, negative vocalization, facial expression, body language, consolability, each 0–2 (total 0–10) |
| Critical-Care Pain Observation Tool (CPOT) | Intubated or sedated ICU patients | Facial expression, body movements, muscle tension, ventilator compliance or vocalization |
| DN4 and LANSS | Suspected neuropathic pain | DN4 score of 4 or more out of 10, or LANSS score of 12 or more, suggests neuropathic pain |
Use the same tool at every visit and record the score before, during, and after procedures so that analgesic changes can be judged objectively. A patient's self-report is the reference standard when the patient can give one; behavioral tools are for patients who cannot.
Pain Patterns That Point to Etiology
- Arterial ischemia: Claudication with walking; rest pain in the forefoot that is worse at night and with elevation and is relieved by hanging the foot over the bed. Rest pain signals chronic limb-threatening ischemia.
- Venous disease: Aching, heaviness, and swelling that worsen with standing and improve with elevation and compression; small ulcers near the malleolus (and atrophie blanche) can be surprisingly painful.
- Pressure injury: Pain over the injured area, sometimes the first sign of deep tissue injury before the skin changes.
- Pain out of proportion: Pyoderma gangrenosum, calciphylaxis, vasculitis, Martorell hypertensive ulcer, and necrotizing soft tissue infection.
- Neuropathic foot: Often painless. New pain, throbbing, or aching in a neuropathic foot suggests deep infection, abscess, osteomyelitis, or acute Charcot neuroarthropathy and calls for prompt evaluation.
- Rising pain in any wound: A classic sign of local infection, along with increasing exudate, odor, friable granulation, and wound breakdown.
From Assessment to Management
- Treat the cause: Revascularize ischemia, control infection and edema, and offload pressure.
- Background pain: Scheduled acetaminophen or NSAIDs when safe; add neuropathic agents (gabapentin, pregabalin, duloxetine, nortriptyline) for neuropathic features; use opioids short-term and carefully, especially in older adults and those with kidney disease.
- Procedural pain: Time oral short-acting analgesics to peak during care (often 30 to 60 minutes beforehand); apply topical lidocaine-prilocaine cream under occlusion for about 30 to 60 minutes before debridement; consider regional blocks for larger procedures.
- Dressing technique: Choose atraumatic silicone contact layers or other low-adherent dressings, soak adherent dressings before removal, warm cleansing solutions, avoid unnecessary exposure, and let the patient call "time-outs."
- Reassess with the same scale and adjust the plan.
Clinical Traps
Trap 1: Assuming a Painless Diabetic Foot Is a Stable Foot
Neuropathy hides warning pain, so any new pain in a neuropathic foot deserves a search for infection or Charcot changes rather than reassurance.
Trap 2: Using a Numeric Scale in Advanced Dementia
A patient who cannot understand a 0–10 scale may score 0 while grimacing and guarding. Use a behavioral tool such as PAINAD and watch the patient during care.
An 88-year-old woman with advanced Alzheimer disease who cannot follow simple commands has a stage 4 sacral pressure injury. During repositioning she grimaces, moans, and pushes the nurse's hand away. Which approach is most appropriate for assessing her pain?
A 57-year-old man with diabetic neuropathy has had a painless plantar ulcer under the second metatarsal head for 3 months. Today he reports a new throbbing ache in the foot that keeps him awake. What does this change most likely indicate?
A 70-year-old woman with a painful venous leg ulcer rates her pain 3/10 at rest but 9/10 during weekly sharp debridement, and she has started cancelling visits. Which plan best addresses her procedural pain?