Two injuries account for most of the bandaged legs you see around a Thai beach town. One is road rash — skin taken off an elbow, hip, knee or the top of a foot when a scooter goes down. The other is a burn on the inside of the right calf from a hot exhaust, which people call the Thai tattoo and which is usually collected while getting off a parked bike rather than in any crash. Neither is dramatic. Both go bad faster here than at home.
That last point is the reason this page exists. A graze you would wash under a tap and forget about at home behaves differently in 33-degree heat and 80% humidity, with sweat, sea water and road grit involved. Wounds that would heal in a week take three, and a proportion get infected. The first hour of care matters more than anything afterwards, and the threshold for seeing a doctor should be lower than you are used to.
- The single most important stepGet all the grit out, with running water
- Exhaust burn temperatureEnough to burn through skin in about a second
- Typical healing, uninfectedSlower here than at home
- See a doctor ifGrit remains, it blisters, or it is bigger than your palm
Why tropical wounds behave differently
Nothing mysterious is going on. Four ordinary factors stack up.
- Heat and humidity. Warm, damp skin is a better environment for bacteria than cool dry skin, and a wound that stays wet under a dressing does not close.
- Sweat. It softens the wound edges, lifts dressings and makes tape fail — a dressing that would last two days at home lasts an afternoon here.
- What is on the road. Thai surfaces carry a lot of grit, oil and organic material. A sliding fall grinds it in, and anything left in there is both a source of infection and the reason a scar tattoos permanently.
- The sea and the pool. Both introduce organisms to an open wound. This is the specific reason so many holiday grazes go wrong: the injury happens on day three and the swimming carries on.
Do not swim with an open wound. This is the single most-ignored piece of advice on the page and the commonest reason a minor graze becomes a course of antibiotics. Sea, pool, waterfall, rice paddy — all of them. Wait until it has properly closed over.
Road rash: the first hour
This is first response, not treatment. Stop the bleeding, get the contamination out, cover it — then get someone qualified to look at anything more than superficial.
- Deal with the crash first. Get off the road, check whether anyone else is hurt, and if another vehicle is involved do not let the wound distract you from the paperwork — what to do after a road accident in Thailand sets out the order.
- Stop significant bleeding with firm, direct pressure through a clean cloth. Most road rash oozes rather than bleeds; anything pumping or not stopping with pressure needs an ambulance on 1669.
- Wash it, properly, with running water. Several minutes, with enough flow to flush debris out rather than push it in. This is the step that decides how the wound goes.
- Get the grit out. If it will not flush, it needs tweezers, good light and preferably a local anaesthetic — which means a clinic. Grit left in stays in; it is why the mark is permanent.
- Cover it loosely with a clean, non-fluffy dressing. Not cotton wool, which sticks and disintegrates into the wound.
- Then get it looked at, the same day, if it is more than a superficial scuff, has grit in it, is over a joint, or is larger than your palm.
Two things not to do: do not scrub it with anything abrasive, and do not use anything from a hotel first-aid kit you cannot identify. Iodine solution, sold in every Thai pharmacy, is the standard antiseptic here and is fine on a cleaned wound.
For grazes and dressings, a clinic or a hospital outpatient department is quick and cheap by Western standards, and dressings clinics in tourist towns deal with scooter injuries all day — you will not be a novelty. For a possible fracture, a head injury, stitches, or debris that needs cleaning under anaesthetic, go to a hospital. Thai hospitals after a crash and what it costs covers the deposit question and the size of the bill.
Ask about tetanus. A wound contaminated with road dirt is exactly the kind that raises the question, and whether you need a booster depends on your own vaccination history rather than on the wound. It is a two-second conversation at any Thai clinic and worth having.
Exhaust burns
The exhaust runs down the right-hand side at calf height, is uncovered or barely shielded on many rental machines, and stays dangerously hot long after the engine stops. The burn happens in ordinary moments: swinging a leg over, getting off with the bike on its stand, a passenger dismounting on the wrong side, a child's leg swinging while the bike is parked.
It is not a graze. A contact burn from metal at that temperature goes below the skin surface almost immediately, which is why it blisters, hurts for days and heals slowly — and in this climate it is one of the more reliably infected injuries a rider collects.
First response for a burn
- Cool it under running water for twenty minutes. Cool, not cold; tap water is right. This is the whole of the useful first aid, and worth doing properly even if it feels excessive.
- Take anything tight off before it swells — a sock, an ankle strap, a watch.
- Cover it loosely with clean, non-adherent material. Cling film is a recognised temporary burn covering and easy to find.
- Do not apply ice, butter, toothpaste, aloe straight from a plant, or any of the other things you will be offered. They do not help and some make it worse.
- Do not burst blisters. The blister roof is the best dressing there is.
Go to a hospital or clinic the same day if the burn blisters, is bigger than the palm of your hand, is on a joint, or is on a child. Burns are routinely underestimated in the first hour, and a deep burn that is managed badly for three days is a much bigger problem than one seen on day one. This is not a wait-and-see injury.
When to stop treating it yourself
The signs that an injury has stopped being a self-care problem are the same whatever caused it: spreading redness, pain increasing rather than settling after the first day, heat and swelling, pus or a bad smell, red streaks running from the site, a fever, or feeling generally unwell. Any of those means a doctor today.
Two situations change the calculation entirely. If an animal was involved — a dog bringing you down, or a bite or scratch during the fall — that is a potential rabies exposure and is urgent however minor the wound looks; dogs on the road in Thailand covers it. And if you hit your head at all, the graze is the least interesting part of the injury.
Preventing the whole category
Both injuries come from bare skin meeting something hard or hot, and both are almost entirely preventable with clothing nobody would call protective gear.
- Closed shoes. They stop the foot injuries and put something between your ankle and the exhaust — riding a scooter in flip-flops covers why this is the highest-value change available.
- Gloves. Hands go out automatically and palms take the road first. See gloves and footwear for riding in Thailand.
- Something on your legs and arms. Even thin long trousers and a long-sleeved shirt turn a full-thickness graze into a scuff. Protective riding clothing in a hot climate is honest about what is worth the heat.
- Mount and dismount on the left. The exhaust is on the right. Costs nothing, removes most burns.
- Carry a small kit under the seat: clean water, a few non-adherent dressings, tape that survives sweat, and iodine.
If the injury came with a fall, photograph it and keep every receipt — Thai clinics issue them readily and your insurer will want them. Whether any of it is claimable depends on decisions made before you got on the bike, and does travel insurance cover driving in Thailand? is where that gets worked out.
Frequently asked questions
Can I swim with road rash?
No, not until it has closed over. Warm sea water and pool water are the commonest route to an infected holiday graze, and this is the advice people ignore most and regret most. If the whole point of the trip is the water, that is an argument for taking the wound seriously on day one rather than for swimming on it.
Should I keep the wound covered or let it dry out?
Ask the clinic that dresses it, because it depends on the wound. What is not in doubt is that a dressing in this climate needs changing more often than you would at home, because sweat lifts it and keeps the surface wet.
Will an exhaust burn scar?
Often, yes — it is a deep burn on a visible part of the leg. Getting it cooled properly in the first twenty minutes and keeping it clean and out of the sun gives it the best chance. Once healed, the new skin burns very easily, so keep it covered.
How do I know if a wound is infected?
Pain that increases rather than settles after the first day, spreading redness, heat, swelling, pus, a bad smell, red lines running from the wound, or a fever. Any of those means a doctor the same day rather than another pharmacy visit.
I hit my head as well but I feel fine. Do I need to be seen?
Yes. A head injury that feels fine at the roadside and deteriorates hours later is the pattern that matters, and it is not something to judge yourself on a beach. Get assessed, and tell them you were on a motorbike.