Dry Drowning and Secondary Drowning: What to Actually Watch For

This page explains what the terms mean and what the evidence says. It is general first aid information and not clinical advice. If you are worried about someone now, call 111, or 999 if they are struggling to breathe, drowsy or unresponsive.

If something has just happened

Dealing with that first, because it is probably why you are here.

Call 999 now if the person is:

• Struggling to breathe, breathing fast, or making noise when breathing
• Drowsy, confused, floppy, unusually irritable or hard to rouse
• Blue or grey around the lips
• Unresponsive, or was unresponsive at any point
• Someone who needed rescue breaths or chest compressions, even briefly, even if they seem fine now

Call 111 for advice if the person was in difficulty in water and has a cough that is not settling, chest pain or tightness, is more tired than usual, or has vomited since. Trust your judgement about a child who is simply “not themselves”.

You can reasonably keep an eye at home if they swallowed or spluttered a little water, coughed it out within a minute or two, and are now behaving entirely normally: playing, talking, eating, breathing comfortably. That is the overwhelming majority of pool and bath scares, and it does not need a hospital.

What you are watching for is change, not the passing of time. If they develop any of the symptoms above, act then.

Where the terms came from, and why they were dropped

“Dry drowning” was originally a clinical idea about laryngospasm, the throat closing to keep water out. “Secondary drowning” described lung problems appearing some time after a rescue. Neither survived scrutiny.

At the World Congress on Drowning, an international consensus agreed a single definition: “Drowning is the process of experiencing respiratory impairment from submersion/immersion in liquid.” The same consensus stated that “the terms wet, dry, active, passive, silent, and secondary drowning should no longer be used.” Clinical references now say plainly that wet drowning, dry drowning and near-drowning “are no longer accepted”.

Two reasons that matters more than it sounds like pedantry.

First, the terms describe mechanisms that were never established. Whether a throat spasm really prevents water entering the lungs has never been substantiated, so a diagnosis built on it cannot be either.

Second, and more practically, the words did real harm. “Secondary drowning” told parents that a child could die days later from something invisible, which is not what happens, and it displaced the useful message, which is to watch for breathing problems.

Drowning is now described as a process with one of three outcomes: death, survival with morbidity, or survival with no morbidity. There are no sub-types to memorise.

So what can actually happen after a rescue?

Something real, which is why dismissing the whole question is as wrong as the myth.

If someone inhales water, the injury happens at the time, not later. Water damages the lining of the lungs and interferes with the substance that keeps the air sacs open. The consequences of that injury can take a few hours to show, as inflammation and fluid build up and breathing gets harder.

Three things to hold on to about that.

• It is rare. Clinical guidance notes that only rarely does someone with a normal initial chest X-ray go on to develop significant fluid on the lungs, and where it happens it is within about 12 hours.
• It is not silent. This is the single most important correction to the myth. Someone deteriorating has symptoms: coughing, laboured or rapid breathing, chest discomfort, and changes in how alert or settled they are. A child running around normally is a child whose lungs are working.
• It is hours, not days. Hospitals observe people with mild or no symptoms for four to eight hours and discharge them if they stay stable, with advice on what to come back for. That is the professional yardstick, and it tells you the window is short.

Notice what that does not give you: a time after which you can stop paying attention. The reason clinicians watch for hours is to see whether symptoms appear, and symptoms remain the thing that matters at hour two or hour ten.

Why the myth is so persistent

Because it is frightening, shareable, and arrives attached to real tragedies.

When a child dies after a day at the water, “secondary drowning” is a far more satisfying explanation than the truth, which is usually that they were in serious difficulty at the time and the severity was not recognised. The myth then circulates as a warning, and because it is impossible to disprove to a worried parent at midnight, it sticks.

There is also a search-engine problem. Most of what ranks for these terms uses the words as though they described conditions, because that is what people type. We have used them in the title of this page for exactly that reason. The difference is what the page then tells you.

Drowning in a workplace

Drowning is not only a holiday risk. It is a foreseeable workplace hazard in water treatment and utilities, docks and marine work, fishing, dredging, construction near water, agriculture with slurry stores and open tanks, and in leisure centres and swimming pools.

Three things follow for an employer:

• It belongs in your risk assessment. Work near water that could result in drowning is a hazard your general assessment should identify, with the usual duty to avoid, control and then protect. We set out what an assessment has to contain in workplace risk assessment.
• It changes your first aid provision. A workplace where drowning or near-drowning is foreseeable is not an office. Your first aid needs assessment should reflect that, which usually points at the three-day First Aid at Work qualification rather than the one-day course.
• Rescuer safety comes first. Resuscitation Council UK guidance is that rescuers and first responders “should prioritise their safety and use the safest rescue technique”. Would-be rescuers drown. Reach or throw before you ever consider entering water.

First aid for drowning is not standard CPR

This is the part worth knowing even if you never think about the terminology again.

Adult resuscitation normally starts with chest compressions, because a sudden cardiac arrest is usually a heart problem and there is still oxygen in the blood. Drowning is the opposite: it is an oxygen problem, and the heart stops because breathing failed first.

So resuscitation after drowning starts with five rescue breaths, then continues with standard CPR. Resuscitation Council UK guidance is to start with five ventilations and continue with the standard protocol, and for children to begin standard paediatric basic life support with five rescue breaths as soon as it is safe to do so, on land or in a boat. Do not attempt rescue breaths in the water.

Cold changes one more thing. Where hypothermia is recognised, the guidance is to follow the hypothermia recommendations, and in hypothermic cardiac arrest to start CPR in every case and as soon as possible. Cold water outcomes can be better than they look, so a casualty pulled from cold water is a reason to start and keep going rather than to make a judgement.

We go through the paediatric sequence, including why five breaths come first and how infant technique differs, in baby and child CPR.

What to take away

• Stop looking for “dry drowning” and “secondary drowning”. They are not conditions, and searching for them will mostly find you frightening content built on an abandoned idea.
• Watch breathing and behaviour after any water incident, not the clock.
• Anyone who needed rescue breaths or compressions needs medical assessment, however well they look afterwards.
• If you are unsure, 111 exists for this. If breathing is affected or they are drowsy, 999.

Frequently asked questions

Is dry drowning real?

Not as a diagnosis. The term was abandoned by international consensus, along with wet, active, passive, silent and secondary drowning, and it is not used by the NHS or the Resuscitation Council UK. What is real is that inhaling water injures the lungs, and the effects of that injury can take a few hours to show.

Is secondary drowning real?

No, not as a condition. The term described lung problems appearing after a rescue, but it was formally dropped because it was confusing and misleading. Deterioration after inhaling water does happen, it is rare, and it occurs within hours with clear symptoms rather than days later without warning.

What does the NHS say about secondary drowning?

You will not find it described as a condition, because the medical consensus abandoned the term. NHS advice follows the symptoms instead: get help for breathing difficulty, drowsiness or someone who is not themselves after a water incident, and call 999 if breathing is affected or they are hard to rouse.

How long after swimming can a child develop problems?

Where it happens, it is within hours. Clinical guidance notes that significant fluid on the lungs after a normal initial chest X-ray is rare and occurs within about 12 hours, and hospitals observe people with mild or no symptoms for four to eight hours. There is no realistic scenario in which a child who is completely well for a day deteriorates out of nowhere.

What symptoms should I watch for after my child swallowed pool water?

Breathing that is fast, laboured or noisy, a cough that does not settle, chest pain, blue or grey lips, unusual drowsiness or irritability, confusion, or vomiting. Swallowing a mouthful of water and coughing it straight out, followed by behaving completely normally, is not a warning sign.

My child coughed after going underwater but seems fine. Do we need A&E?

If the cough settled within a minute or two and they are now playing, talking and breathing comfortably, that is the usual outcome of a pool scare and does not need a hospital. Keep an eye on breathing and behaviour, and get help if either changes. Call 111 if you want someone to talk it through with.

Can you drown hours after leaving the water?

Not in the sense the myth describes. Someone whose lungs were injured by inhaled water can get worse over the following hours, but they will be unwell while it happens. Nobody drowns silently on the sofa having been entirely well.

How common is it?

Rare. Clinical references describe it as an uncommon outcome even among people who have inhaled water and been assessed in hospital, which is why the professional approach is a short period of observation rather than routine admission.

Why do you still use the terms if they are not real?

Because they are the words people search for when they are worried, and a page that refuses to use them never reaches anyone. The terms are in the title; the correction is in the content.

What is the first aid for drowning?

Get the casualty out of the water safely without putting yourself at risk, and call 999. If they are not breathing normally, start with five rescue breaths and then continue with standard CPR, because drowning is an oxygen problem rather than a primary heart problem. Never attempt rescue breaths in the water.

Does this come up on a first aid course?

Yes. Drowning is one of the situations where the sequence genuinely differs from standard adult CPR, and it is covered along with the reasoning on our first aid courses. The paediatric course goes into infant and child technique specifically.

If your workplace has water on site, or you look after children around water, this is worth learning properly rather than reading about. Call 0845 838 4643 or use the enquiry form on this page and we will talk through what your first aid needs assessment points at.