Grading Thermal Injury: From Redness to Burn Blisters
The Boundary
Energy treatments are controlled thermal injury by design: redness, warmth and mild swelling are expected. The line is degree and time curve — intensity beyond the modality’s norm, or a clearly delayed fade, means assess as thermal injury.
Four Grades and Handling
| Grade | Signs | Handling |
|---|---|---|
| 0 — expected | Erythema, warmth, mild swelling; fades in 24-72 h | Cooling, moisture, observe |
| I — superficial | Marked erythema >72 h, tightness, reticulated pattern | Intensive repair + strict sun protection, follow up; watch PIH |
| II — blisters/superficial partial-thickness | Blisters, exudate, marked pain | Aseptic management, dressings, infection prevention, physician in charge |
| III — deep partial or beyond | Pale/waxy skin, reduced sensation, large area | Immediate burn-center referral |
Clinic Protocol Points
- Recognize on the spot: monitor endpoint reactions; gray-white change or unusual pain means stop and assess.
- Document: photos, parameters, device status — the basis for fault tracing and liability.
- Escalation: grade II+ handled by a physician with written notice; grade III — immediate referral and emergency plan.
- Review: every grade I+ event gets a parameter-skin type-device status review.
FAQ
Are blisters normal?
No. Blisters are grade II — energy or cooling failed somewhere. Marketing blisters as “detox” is dangerous misinformation.
Will it scar?
Grade I usually not; grade II mostly heals clean when handled well — depth and infection decide scarring, hence disciplined grade-II care.