Motorbike Exhaust Burn: First Aid Done Right

Key takeaways

The most important thing is cooling it at once under cool running water. According to NHS, hold it there for 20 minutes and do it as soon as possible — cooling for long enough is what decides whether it heals cleanly or scars.
NO ice. According to NHS, never use ice or iced water on a burn; MedlinePlus explains that the extreme cold of ice damages the still-living skin further.
Put nothing on it: toothpaste, fish sauce, python fat, oil, turmeric and leaf poultices all belong to what NHS calls “creams and greasy substances” — the things not to use on a burn.
A blister means the burn has gone through the outer layer of skin and is no longer a graze. Do not burst it — a burst blister becomes infected easily. Be seen the same day.
Touching the burn and feeling NOTHING, or numbness, skin that is waxy white or charred, a burn the size of a hand or larger: go to emergency care. The pain stopping is not good news here.

An exhaust burn is small and it is on the lower leg, so it tends to be filed under things that will heal anyway — and people put something on it. But a hot exhaust pipe pressed against skin takes less than a second: a mark no bigger than a finger can already have gone through the outer layer of skin, and what decides whether it heals cleanly or scars happens in the first few minutes.

Recognising it: the burn is deeper than it looks

Only red, stinging and swollen: the damage is in the outer layer of skin — still cool it for long enough and keep watching.
A blister with clear fluid: according to MedlinePlus, the burn has gone into the layer of skin beneath as well.
Skin that is waxy white, grey, brown or charred, looking like leather: a deep burn — see the red-flag box.
Touching it and feeling NO pain, or numbness: according to MedlinePlus, a deeply burned area can lose sensation. The pain stopping here is a sign of severity, not a sign of improvement.
Easily misread: a burn on the ankle or the top of the foot takes longer to heal, because the skin there is thin and clothing rubs it.

What to do in the first few minutes

Turn on the tap and let water run over the burn. According to NHS, hold it under cool running water for 20 minutes, as soon as possible; with no tap, use cool water from a bottle or a clean cloth soaked in cool water, changing the cloth continuously.
Take off shoes, socks, anklets and rings near the burn before the swelling starts. According to NHS, do not remove anything that is STUCK to the burn — fabric from trousers or road tar is left in place and seen by a doctor.
Cover the burn after cooling it. According to NHS, lay cling film OVER the burn in a single layer, rather than wrapping it round the limb; a burnt hand can be slipped inside a clean clear plastic bag. With neither, use clean non-stick gauze.
If the burnt area is LARGE, keep the rest of the body warm while you cool it: according to NHS, cooling a large area can lower body temperature, particularly in young children and older people.
For pain, use painkillers — NHS names paracetamol (acetaminophen) or ibuprofen; children and teenagers do not take aspirin. The dose is for a doctor or pharmacist to decide.

What you must NOT do

Do NOT use ice or iced water. According to NHS, never use ice or iced water; MedlinePlus says the extreme cold of ice damages the still-living skin further.
Do NOT apply toothpaste, fish sauce, python fat, oil, turmeric, leaf poultices or someone else's tube of ointment. According to NHS, do not use creams and greasy substances such as butter on a burn; MedlinePlus adds lotions, oils, cortisone and egg white. The folk remedies above belong to that group.
Do NOT burst a blister, do not peel off loose skin, and do not pull off anything stuck to the burn. According to NHS, a blister that bursts becomes infected easily.
Do NOT put a sticking plaster on a burn, and do not use a dressing that sheds fibres, because the fibres catch in the burn (MedlinePlus).
Do NOT buy antibiotic ointment yourself: MedlinePlus says a topical treatment does not need to contain an antibiotic, and some of them cause allergic reactions.
Do NOT soak a large burn in cold water — MedlinePlus warns that this can cause shock; with a large burn, call for an ambulance.

Blisters, dressings, and the question of scarring

According to MedlinePlus, wash the burn gently with water and soap, you may apply a THIN layer of petroleum jelly or aloe vera gel, cover it with a non-stick dressing, and change the dressing daily. On the scar: according to NHS, for the first few years after a burn keep direct sunlight off that patch of skin, because sun can make it blister — cover it with cotton clothing and use a high-factor sunscreen.

A burn is an open wound: the tetanus question

According to NHS, after some burns a person may need a tetanus injection, because tetanus is caused by bacteria entering through a wound; MedlinePlus advises checking whether your immunisation is still up to date and asking a doctor about a booster. What gets injected is the doctor's decision after looking at the burn — do not work it out at home. Bring your vaccination record if you still have it.

When you must go to hospital

GO TO EMERGENCY CARE or call 115 (the emergency number in Vietnam) NOW if: the burn is the size of a hand or larger · the skin is waxy white, grey or charred, looking like leather · touching it gives no pain, or numbness · the burn is on the face, the genitals or the anus · the burn was caused by a chemical, an acid or electricity · smoke has been inhaled, or there is a hoarse voice, difficulty breathing or blue lips · the burnt person is pale and cold, sweating, or barely conscious · or you are not sure how bad this burn is. According to NHS, do not drive yourself to emergency care: get someone to take you, or call for an ambulance. — BE SEEN THE SAME DAY if: the burn has a blister, however small · a blister has already burst · the burn has soil, grit, road tar or engine oil in it · something is stuck to the burn that you cannot get off · your tetanus immunisation history is unclear · the burnt person is a young child, an older person, someone with diabetes or someone with a weakened immune system.

Below those two levels: a burn that is only red and stinging, with no blister, properly cooled and with a clear immunisation history, can be watched at home. Be seen if the pain, redness or swelling RISES, if cloudy fluid or pus comes out, if red streaks run away from the burn, if glands swell, or if there is a fever — MedlinePlus lists these as signs of infection.

What can be done at home

Not at home: the first assessment of a burn with a blister, any removal of dead tissue, and tetanus immunisation all belong at a medical facility. What we can do: a remote consultation so you can decide whether to be seen or to watch it; a doctor coming to the house to take the history and examine; and a nurse assessing an open wound, cleaning it and changing the dressing with proper sterile technique. With a sign from the box above, go in first and call afterwards.

The first-aid timings, the list of things not to apply and the aftercare follow the public material of NHS in the United Kingdom and MedlinePlus at the United States National Institutes of Health. CDC has no public first-aid page for burns, so this article does not cite CDC. Citing NHS and MedlinePlus here does not imply that either body endorses Y Te Xanh or our services.

Need personalised advice for your loved one? Call our hotline 094 368 81 15 (24/7) — calling to ask a question or to book costs nothing. GreenCare has doctors who come to examine, nurses who carry out doctor's orders (injections, infusions, dressing changes), remote consultation by video call, and a review of the medicines you are taking; an in-depth remote consultation, or any one after the first, is a paid service. For children we take examination and acute care only — not long-term care at home, and not newborns or expectant mothers. We confirm we have staff in your area and provide transparent pricing before we begin.

Sources

NHS — Burns and scalds
MedlinePlus — Burn

Frequently asked questions

What should I put on a motorbike exhaust burn so it heals fast and does not scar?

At the moment it happens, nothing at all — what helps is cool running water. According to NHS, do not use creams and greasy substances such as butter on a burn, and never use ice; MedlinePlus adds lotions, oils, cortisone and egg white. Toothpaste, fish sauce, python fat, turmeric and leaf poultices all belong to that group. Once the burn has been cooled and covered, MedlinePlus allows a thin layer of petroleum jelly or aloe vera gel. As for the scar, the most effective thing turns out to be keeping the sun off it: NHS advises covering that patch of skin with cotton clothing and using a high-factor sunscreen for the first few years.

The blister is large and tight. Can I pierce it to relieve the pressure?

No. According to NHS, a blister that bursts becomes infected easily, and MedlinePlus says an opened blister is a way in for bacteria. The skin over the blister is doing exactly the job of a sealed dressing. Cover the burn with a non-stick dressing, bandage it loosely, keep clothing from rubbing it, and be seen the same day — a blister means the burn has gone through the outer layer of skin, which is worth having someone qualified look at. If the blister bursts on its own, wash it gently with water and soap, cover it again, and watch for signs of infection.

I put toothpaste on it before I knew that was wrong. What now?

Do not scrub it off. Let cool water run over it to carry most of it away, wash gently with water and soap as MedlinePlus advises, then cover with a non-stick dressing and be seen the same day. Tell the doctor or nurse exactly what you applied and when — that is information they need, not something to be embarrassed about. Whatever has been put on the burn makes it harder for the person examining it to read the colour and the surface, so saying so helps them judge the depth correctly.

Does an exhaust burn need a tetanus injection?

It may, and that is the doctor's decision rather than something to work out at home. According to NHS, after some burns a person may need a tetanus injection, because tetanus is caused by bacteria entering through a wound; MedlinePlus advises checking whether your immunisation is still up to date and asking a doctor about a booster. Bring your vaccination record if you still have it; if you cannot find it, go anyway and say you do not remember. Tetanus vaccine is given at a medical facility, and we do not do this at home.

How long does an exhaust burn take to heal, and how do I know it has become infected?

NHS says a minor burn usually heals within about two weeks and leaves very little mark; a deeper burn takes longer and scars more easily. But the number of days is not the thing to go by — the direction of travel is the part that matters. According to MedlinePlus, see a doctor at once if there are signs of infection: rising pain, redness and swelling spreading, cloudy fluid or pus coming out, red streaks running away from the burn, swollen glands, or a fever. MedlinePlus also advises contacting a doctor if there is still pain after two days, or if the burn looks as though it is scarring.

Can a nurse come to the house to change the dressing on a burn?

Yes, for a burn that a medical facility has already looked at and given a plan for. A Y Te Xanh nurse examines and assesses the open wound — size, depth, signs of infection — cleans it and changes the dressing with proper sterile technique, explains how to look after it between visits, and follows the healing at home or at a hotel. For a severe burn or spreading infection, we work with a doctor and advise on transfer to hospital when that is needed. The first assessment of a burn with a blister, though, belongs at a medical facility.