Croup is an infection of the voice box and windpipe. It is often mild, and most
children soon recover. A steroid medicine is usually prescribed to ease symptoms.
In some cases severe breathing difficulties develop. A small number of children with
croup are admitted to hospital, usually for a short time until symptoms ease.
What is croup?
Croup is an infection of the larynx (voice box) and trachea (windpipe). These are the upper and lower parts of the breathing tube that connects the mouth to the top of the lungs. The usual cause of croup is a viral infection. Several viruses can cause croup.
Who gets croup?
Croup is common in young children and occurs most commonly between the ages of one and three years. As children become older, their breathing tube becomes firmer and wider. Therefore, croup becomes uncommon after the age of six years. An infection by a similar virus in an older child or adult may cause a cough or sore throat, but is unlikely to cause the breathing symptoms of croup (described below). However, symptoms of croup occur rarely in teenagers or adults.
Croup often occurs in epidemics in the winter. Some children have two or more bouts of croup in their childhood.
What are the symptoms of croup?
, which is usually harsh and 'barking'. This 'croupy' cough is due to
inflammation and swelling of the vocal cords in the larynx.
The infection causes inflammation on the inside lining of the
breathing tube. There may also be a lot of thick mucus. A combination of these can cause narrowing of the breathing tube. The narrowed tube may cause noisy breathing (stridor). Breathing may become difficult if the narrowing becomes worse.
that may occur include a runny nose, hoarseness, and sore throat.
Croup may follow a cold, but can also appear 'out of the blue'. Other cold or 'flu type symptoms may also occur. For example, fever, feeling unwell, being off food, and general aches and pains.
The symptoms are often worse at night. Typically, during the day a child may have a croupy cough with cold symptoms, but not be too unwell. However, at night the cough and breathing symptoms often become worse. Symptoms usually peak after 1-3 days, and then improve. A mild but irritating cough may last a further week or so.
How serious is croup?
Symptoms are often fairly mild, but sometimes become severe. Many children just get a croupy cough with some cold symptoms. Any breathing difficulty is often mild. Parents can expect to have one or two disturbed nights nursing a coughing child. Most children with croup remain at home and soon recover.
The main concern is if severe narrowing of the breathing tube develops. If this occurs then breathing can become difficult. About 1 in 10 children with croup are admitted to hospital for observation. This is usually if symptoms suggest a narrowing of the breathing tube. Most children admitted to hospital come home within 24 hours as symptoms usually improve quickly. In a small number of cases, a 'ventilator' is needed to help the child to breathe. This is just for a short period whilst the infection and inflammation settle down.
What can I do to help a child with croup?
A doctor will normally advise on what to do, or whether hospital admission is needed. The sort of advice your doctor may give is as follows:
Be calming and reassuring.
A small child may become distressed with croup.
Crying can make things worse. Sit the child upright on your lap if their breathing is noisy or difficult. Let the child find a comfortable position.
Lower the fever.
If a child has a fever (high temperature) their breathing is often
faster, and they may be more agitated and appear more ill. To lower a fever:
give paracetamol liquid (Calpol®, Disprol®, etc) or ibuprofen lightly dress the child if the room is not cold
Give the child lots of cool drinks
(if they are happy to take them).
- some people find that it is helpful to have a stroll outdoors, carrying the
Steam used to be commonly advised as a treatment. It was thought that steam may 'loosen' the mucus and make it easier to breathe. However, there is little evidence that this does any good. Also, some children have been scalded by steam whilst being treated for croup. Therefore, steam is not recommended. Also, DO NOT make a child with breathing difficulty lie down or drink fluids if they don't want to, as that could make breathing worse.
A steroid medicine
such as dexamethasone or prednisolone is usually prescribed.
Steroid medicines help to reduce inflammation. A single dose often eases symptoms within a few hours. Steroid medicines do not shorten the length of the illness, but they are likely to reduce the severity of breathing symptoms.
DO NOT give cough medicines which contain ingredients that can make a child
drowsy. This will not help a child who may need extra effort to breathe. You may not be aware of all the ingredients of cough medicines, and so it is best to avoid them altogether. There is no evidence anyway that cough medicines and decongestants help in croup.
Antibiotics are not usually prescribed as croup is normally caused by a virus.
When to seek medical help
Always consult a doctor or nurse if you have any concerns about your child. Most children with croup have mild symptoms and soon get better. However, a minority need hospital care. In particular, see a doctor quickly if:
Breathing symptoms get worse. (Breathing is often noisy with mild croup, but it is
in breathing that is worrying.) Signs that breathing is getting worse include:
rapid breathing; needing more effort to breathe; you may see the chest or neck
muscles being pulled in with each breath.
The child becomes restless or agitated. The child looks unusually pale. A high fever persists despite giving paracetamol or ibuprofen.
And call call for an emergency ambulance if the child is:
Blue (cyanosed) Unusually sleepy Struggling to breathe Drooling and unable to swallow
Croup, Clinical Knowledge Summaries (September 2008) Molodow R, Defendi G; eMedicine, Croup. September 2007.; Good overview
Russell K, Wiebe N, Saenz A, et al; Glucocorticoids for croup.; Cochrane Database
Comprehensive patient resources are available at www.patient.co.uk
This article is for information only and should not be used for the diagnosis or treatment of medical conditions.
EMIS has used all reasonable care in compiling the information but make no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. For details see our conditions.
EMIS 2009 Reviewed: 20 Nov 2008 DocID: 4429 Version: 40
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