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Why did my child faint, and what should I do?
A faint is a brief loss of consciousness. Most children recover fully, but some signs mean you need urgent help.
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What it is
A faint, also called a syncope, is a sudden and short loss of consciousness [2]. It usually happens when not enough blood or oxygen reaches the brain [2]. According to the SEUP, fainting is more common in older people [6].
Some situations make it more likely: extreme heat, pain, fear, nervousness or anxiety, standing still in the same spot for a long time, or getting up suddenly from lying down [2]. Less common causes include low blood sugar in children with diabetes, some poisonings, heart disease and dehydration [2].
Before fainting, a child may feel sick, see blurred vision, have belly pain, sweat, or hear ringing in the ears [1]. These warning signs can help a child notice what is coming and avoid another faint [1]. The child turns pale, stops responding and loses strength, and may fall to the ground [1]. Sometimes there are two or three jerks of the arms and legs when consciousness is lost [1].
Fainting is usually nothing to worry about, but it can sometimes be a sign of a serious problem [6]. In general, faints are not caused by important medical problems and do not need special tests [3]. They are not a disease [3].
What you can do at home
- When your child starts to feel unwell, they should sit or lie down straight away to avoid the faint and the fall [4]. Changing position is often enough to treat it [4]. It helps to breathe slowly and deeply [4].
- If your child loses consciousness, lie them down with the legs raised and the head turned to the side so they breathe better [4].
- When the discomfort and weakness have passed, they can get up slowly. If lying down, they should sit first and stand up after a few minutes [4].
- After a period of rest, children usually recover quickly, within a couple of minutes [4].
- If you know the situations that cause the faints, avoid or change them. For example, do not get up suddenly from sitting or lying [3].
- If your child tends to feel faint when blood is taken, tell the nurse beforehand so they can lie down during the procedure [3].
- Children who tend to faint should drink more fluids, especially when they do physical exercise [3].
When to see a doctor or go to the emergency department
Go to the emergency department or call your local emergency number if:
- Your child takes more than 3 to 5 minutes to regain consciousness. Place them in the recovery position and call the emergency services [5].
- The faint happened during physical exercise, during effort, or while your child was sitting [5].
- The episode came with palpitations, chest pain, jerking of the arms or legs, or your child wet themselves at the end [5].
Also see your doctor if your child faints, so you can find out why it happened [6].
Common questions
Does a faint mean something is wrong with my child’s heart? Heart problems are one possible but less frequent cause of fainting [2]. If the faint happened during exercise or effort, or came with chest pain or palpitations, seek urgent care [5].
How long does it take to recover? After a period of rest, children usually recover quickly, in a couple of minutes [4]. When someone faints, make sure the airway is clear and check for breathing, and the person should stay lying down for 10 to 15 minutes [6].
Can fainting be prevented? Yes. Avoid the situations that trigger it, get up slowly, drink more fluids, especially during exercise, and warn the nurse before blood tests if your child tends to feel faint [3].
Do faints need special tests? In general, faints are not caused by important medical problems and do not need any special study [3]. Still, it is important to see your doctor to find out why it happened [6].
Sources
[1] SEUP — “Síncope. Información para padres” (2025), section “¿CUÁLES SON LOS SÍNTOMAS?”, p. 1 [2] SEUP — “Síncope. Información para padres” (2025), section “¿QUÉ ES UN SÍNCOPE? ¿POR QUÉ SE PRODUCEN?”, p. 1 [3] SEUP — “Síncope. Información para padres” (2025), section “¿CÓMO LOS PODEMOS PREVENIR?”, p. 2 [4] SEUP — “Síncope. Información para padres” (2025), section “¿QUÉ PODEMOS HACER EN CASA CUANDO UN NIÑO O NIÑA SUFRE UN SÍNCOPE?”, p. 1, 2 [5] SEUP — “Síncope. Información para padres” (2025), section “¿CUÁNDO DEBEMOS CONSULTAR EN UN SERVICIO DE URGENCIAS?”, p. 2 [6] MedlinePlus — “Fainting” (2025), p. 1 — https://medlineplus.gov/fainting.html
This guide summarises published paediatric guidelines. It is not medical advice and does not replace your paediatrician. In an emergency, call your local emergency number.
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