Snake Bite: What Never to Do, Go In Now

Key takeaways

The whole value of this article sits in the list of things NOT to do. A tourniquet, cutting the wound, sucking out venom, leaf poultices, ice, a drink of alcohol — these are the most common responses here, and CDC puts all six among the things not to do.
What is actually right is a short list: move the person away from the snake, lie or sit them down and keep them still, take off rings, bracelets and watches before the swelling starts, rinse with clean water and soap, cover with clean gauze, then go to emergency care.
Go now even if it barely hurts. Bites from some species cause almost no pain at first and the main symptoms arrive later, so “no pain yet” does not mean mild. According to CDC, do not wait for symptoms to appear.
Do not catch the snake, and do not kill it to bring along. Just remember the colour and the shape, or photograph it from a distance if that is safe. CDC says never to handle a venomous snake, including one that is already dead.
Do not drive yourself or ride a motorbike to hospital — CDC warns that a snake bite can cause dizziness and fainting. Get someone to take you, or call 115.

After a snake bite, what decides the outcome happens in the first few minutes, and it runs against the usual reflex: do nothing to the bite itself, then go straight to emergency care. According to CDC, every snake bite is to be treated as an emergency.

Recognising it: the signs of a venomous bite

A snake bite usually leaves only one or two small puncture marks. The size of the mark says nothing about the danger, and nobody can tell from looking at the mark whether the snake was venomous.

At the site: puncture marks, bleeding, redness, swelling, bruising or blisters around the wound; severe pain and a tight, bursting feeling
Swelling spreading gradually upwards from the bite
Nausea, vomiting, diarrhoea
Blurred vision or difficulty breathing; a fast pulse, a weak pulse, a drop in blood pressure
A metallic, minty or rubbery taste in the mouth; heavy saliva, sweating
Numbness or tingling around the face and the limbs; muscle twitching

The part most easily missed: at first there may be no pain

According to MedlinePlus, bites from some snake species can be almost painless at first, with the main symptoms appearing many hours later; the same source names drooping eyelids, blurred vision, slurred speech, difficulty swallowing, weakness and then paralysis. This group of signs comes on gradually, so the family often reads it as tiredness or drowsiness. According to CDC, do not wait for symptoms to appear before going.

What to do straight away

None of the steps below needs a prescription. Do them quickly and then go — do not let first aid delay the journey.

Move the person away from the snake, far enough that it cannot strike again.
Have them lie or sit down, stay calm, and move as little as possible. According to CDC, keep the bitten part lower than the heart, in a natural, comfortable position — do not raise it up.
Take off rings, bracelets and watches and loosen tight clothing on the bitten limb, doing it before the swelling starts.
Rinse the bite with clean water and soap, then cover it with clean dry gauze.
Take a pen and draw a line around the outer edge of the swelling, writing the time beside it, and draw again as the swelling spreads — CDC advises doing this; it shows the doctor how fast the swelling is moving. Note the time of the bite as well.
Remember the colour and shape of the snake, or photograph it from a distance if that is safe — CDC is explicit that this means from a safe distance, not going closer.
Call 115 or get someone to drive you to emergency care, and tell the staff immediately that this is a snake bite.

What you must NOT do

Do NOT apply a tourniquet, do not tie anything on, do not bind tightly above the bite. According to CDC, do not apply a tourniquet.
Do NOT slash, nick or cut the bite with a knife, a razor blade or anything else — CDC rules out cutting the wound.
Do NOT suck out venom: not with your mouth, not with a straw, not with a suction device sold for the purpose.
Do NOT apply leaves, folk medicines, medicinal powders or oils, and do not use a “snake stone” — CDC puts folk remedies as a group, along with electric shock, among the things not to do.
Do NOT apply ice, and do not soak the bite in water or any other liquid.

Do NOT drink alcohol for the pain; CDC also advises avoiding coffee and energy drinks.
Do NOT take painkillers on your own: CDC names aspirin, ibuprofen and naproxen specifically. Whether pain relief is needed, and with what, is the doctor's decision.
Do NOT catch the snake and do not kill it to bring with you. CDC says never to handle a venomous snake, including one that is already dead or a head that has been severed.
Do NOT wait to see whether the swelling or the pain gets worse before deciding — according to CDC, do not wait for symptoms to appear.
Do NOT drive yourself or ride a motorbike to hospital: CDC warns that a snake bite can cause dizziness or fainting.

When you must go to hospital

Call 115 (the emergency number in Vietnam) or go to emergency care NOW for EVERY snake bite or suspected snake bite, even when the mark is just two small punctures and it barely hurts — according to CDC, a snake bite is always to be treated as an emergency. More urgent still if there is: swelling spreading fast up from the bite · drooping eyelids, blurred vision, slurred speech, difficulty swallowing, difficulty breathing, weakness or paralysis · bleeding that will not stop somewhere else: the gums, the nose, an old injection site · repeated vomiting · a fast weak pulse, cold clammy skin, dizziness, loss of consciousness · confusion · dark red or tea-brown urine · a bite to the head, face, neck or trunk · a young child bitten. BE SEEN AGAIN within the next one to three days once the hospital has dealt with it, and go sooner if the swelling and pain start rising again, there is discharge or pus, the skin around the bite turns black, or the person becomes much more unwell.

That second level is only the follow-up stage once a medical facility has finished treating the bite — do not place yourself in it.

Who it happens to, and what can be prevented

According to CDC, people who work outdoors are the most exposed — farming, gardening, forestry, construction work; CDC advises long trousers, high boots and thick gloves.
CDC notes that snakes are more active in warm weather and at night — take a light when going out to the fields, into the forest or into the garden after dark.
Do not put a hand or a foot anywhere your eyes cannot see: undergrowth, rock crevices, a woodpile, rice stubble.
Young children who are bitten often cannot tell you. A child playing in the garden who cries, and then has puncture marks and swelling on a hand or a foot, is treated as a snake bite and taken to emergency care.

Plainly: this is an illness that has to be treated in hospital. Antivenom is given at a medical facility, not at home, and according to CDC the sooner it is given the better the bitten limb recovers. What Y Te Xanh can do sits at either end: a remote consultation so you can decide whether to go, and then dressing changes, suture removal and wound monitoring at home as prescribed once the hospital has finished. With a sign from the box above, go in first and call afterwards.

Source: CDC, the guidance page on venomous snakes for people who work outdoors. Citing CDC here does not imply that CDC 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

CDC — Venomous Snakes at Work
MedlinePlus — Snake bites

Frequently asked questions

Does a snake bite need a tourniquet, or something tied above the bite?

No. CDC puts a tourniquet among the things not to do after a snake bite. It is the most common response here and also the most clearly harmful one, because it costs time on the way to hospital without helping at all. Instead: take off rings, bracelets and watches and loosen tight clothing on the bitten limb before the swelling starts, have the person lie or sit still and move as little as possible, keep the bitten part lower than the heart, and go to emergency care now.

I do not know whether the snake was venomous. Do I still need hospital?

Yes, and do not spend time trying to classify it. Deciding from the bite mark or from the snake is not something a non-specialist can do, so treat every snake bite as an emergency — exactly as CDC recommends. Rinse the bite with clean water and soap, cover it with clean gauze, then go to emergency care and say immediately that this is a snake bite. If you remember the colour and shape of the snake, or have a photograph taken from a distance, tell the staff.

The bite does not hurt and there is no swelling. Can I wait and see?

No. According to CDC, do not wait for symptoms to appear before being seen. According to MedlinePlus, bites from some species are almost painless at first and the main symptoms can arrive many hours later — which makes that quiet window the most valuable time to be in hospital, not a time to observe. Go now, and say clearly what time the bite happened and that there are no symptoms yet.

Should I catch or kill the snake and take it in so the doctor knows the species?

No. CDC says not to catch the snake, not to try to keep hold of it, and never to handle a venomous snake — including one that is already dead or a head that has been severed. Going back for the snake risks a second bite and delays the journey to hospital. What the doctor needs is your account: what colour the snake was, what shape, where you were bitten and when. If you managed a photograph from a safe distance, bring the photograph.

Should venom be sucked out, or the wound cut to let blood out?

No. CDC is explicit that the wound must not be slashed with a knife or cut in any way, and that venom must not be sucked out. Sucking with the mouth or with a suction device sold for the purpose does not remove venom, and cutting adds a second wound at exactly the point when bleeding may be hard to stop. What can be done at home is only this: rinse with clean water and soap, cover with clean dry gauze, keep the bitten limb still — then go to emergency care.

Can a nurse come to the house to give antivenom?

No. Antivenom is given at a medical facility, where there are the means to monitor and manage a reaction, so we do not do this at home. What we can do is the two ends of that stretch: hearing your account over a video call so we can say clearly whether this case has to go in now, and then dressing changes, suture removal and wound monitoring at home as prescribed once the hospital has treated it. With a sign from the red-flag box, go in first and call afterwards.