In short. Cooling, covering and calling: the first actions after a burn, the findings that need emergency care rather than a review, and what not to put on the skin.
Key points
- Cooling works because it removes heat that is still in the tissue, which is why it matters most in the first minutes and why it is worth doing before anything else.
- It is also why a burn that is already cooled and covered should be assessed rather than cooled further: prolonged cooling of a large area can lower body temperature without adding benefit.
The first minutes after a burn are the ones that change what the injury becomes, and the actions are simple enough to be remembered under stress. They are the same actions taught for burns from any cause, and they apply to a burn from a laser or energy device as much as to one from a hot surface. What follows is the sequence, and then the findings that mean the sequence ends at an emergency department rather than at a telephone call.
Cool, remove, cover, keep warm
Cool the area under cool running water for about twenty minutes, starting as soon as you can and ideally within the first half hour. Remove anything tight over the area — a watch, a ring, a sleeve — before swelling makes it difficult. Cover the burn loosely with a clean, non-fluffy dressing, or lay a sheet of cling film over it rather than wrapping it tight. Keep the rest of the body warm while you do this, because cooling a small area should not cool the patient.
What not to put on it
Do not use ice or iced water, which reduce the blood supply to injured skin and can deepen the burn. Do not apply butter, oil, toothpaste, a cream, a herbal preparation or an antiseptic of your own choosing. None of them helps, several hold heat or introduce infection, and all of them make the injury harder to read when it is examined. Do not open a blister, and do not take a leftover antibiotic.
Cooling is the treatment, and it is time-limited
Cooling works because it removes heat that is still in the tissue, which is why it matters most in the first minutes and why it is worth doing before anything else. It is also why a burn that is already cooled and covered should be assessed rather than cooled further: prolonged cooling of a large area can lower body temperature without adding benefit.
When the sequence ends at an emergency department
Certain findings are not assessed over the telephone. Blistering, or skin that turns white, grey, leathery or black, means the injury went through or beyond the surface layer. Loss of sensation, or skin that does not bleed as it should, means the same. Pain that keeps worsening after the first day instead of settling is a finding rather than a stage. A burn covering a joint, the whole face or a large area of the body is treated as an emergency in its own right.
Seek emergency care now if
- There is blistering, or skin has turned white, grey, leathery or black.
- There is loss of sensation, skin that does not bleed, or pain that keeps worsening after the first day.
- The burn covers a joint, the whole face, or a large area of the body.
For anything else, cool it, cover it, and call. Being seen early and told that an injury is superficial is a good outcome, and it is the reason the threshold for attendance is set low rather than high.
Frequently asked questions
What should I do first if I think I have a laser burn?
Cool the area under cool running water for about twenty minutes, starting as soon as you can, and remove anything tight over it before swelling makes that harder. Then cover it loosely with a clean, non-fluffy dressing or a sheet of cling film, keep the rest of the body warm, and contact your treating team.
Should I use ice on a laser burn?
No. Ice and iced water reduce the blood supply to skin that has just been injured and can deepen the burn rather than help it, which is the opposite of what cooling is for. Cool running water is the appropriate method and it is the one taught for burns generally.
When should I go to hospital instead of calling?
When the finding is one of the red flags: blistering, skin that has turned white, grey, leathery or black, loss of sensation, skin that does not bleed as it should, pain that keeps worsening after the first day, or a burn covering a joint, the whole face or a large area. Go immediately rather than waiting for a reply.
Risks & Limitations
- Burn depth decides everything that follows, and depth is a clinical judgement made at the bedside rather than at home.
- Superficial injury reddens and settles; deeper injury heals slowly and carries a real risk of scarring and infection.
- Loss of pigment after a burn frequently does not recover, and the treatments available for it are limited and partial.
- Pigment change and scar treatment both wait for the skin to settle, because treating earlier adds inflammation to skin that is already inflamed.
- A burn over a joint is a different problem from the same burn elsewhere, because a scar that tightens can restrict movement.
When to Seek Care
- Blistering, or skin turning white, grey, leathery or black over the treated area — seek emergency care now.
- Pain that keeps worsening after the first day, or an area that has lost sensation or does not bleed as it should — seek emergency care now.
- A burn covering a joint, the whole face, or a large area of the body — seek emergency care now.
- Spreading redness, heat, pus, fever or a foul smell from the treated skin — seek care the same day.
References & Further Reading
- World Health Organization (WHO) — burns fact sheet and first-aid guidance
- American Burn Association (ABA) — burn treatment and referral guidance
- National Institute for Health and Care Excellence (NICE, UK) — guidance on burns and their assessment
- U.S. Food and Drug Administration (FDA) — laser and energy-based device safety information
- Chinese Medical Association Plastic Surgery Branch — clinical guidance
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.