Top tips for looking after an unwell child
- If your child has a fever or is in discomfort, always consider paracetamol and ibuprofen (Calpol and Nurofen / Calprofen) – unless your child has an allergy to these or has been told not to use them because of an underlying medical condition. Calpol and Nurofen can be used together and are really useful for keeping fevers down. (Note – in Chicken Pox, we would recommend paracetamol / Calpol only. Some children with asthma can be sensitive to ibuprofen).
- Always keep an eye on your child’s fluid intake. Keeping hydrated is really important. If they are drinking less, having drier nappies / passing less urine or have other signs of dehydration (see below), then they should be reviewed by a doctor. Keep offering fluids little and often. There is no correct fluid to give to your child – you can try rehydration salts from the pharmacy (Dioralyte) but sometimes children prefer drinks they are familiar with.
- Keep an eye on your child’s breathing. Look out for your child using extra (accessory) muscles to breathe and be alert for your child getting tired if they have been working hard to breathe. See the video below.
- Familiarise yourself with how long common illnesses should last and if your child’s symptoms are lasting longer than this, seek medical advice. See below.
- Remember that you can always ask your pharmacist for advice about over-the-counter medicines for children over 2, if you are not too concerned but would like some support.
- Be on the look out for the worrying symptoms that we talk about below.
- Trust your instincts – you know your child better than anyone – if you are worried, book a doctor’s appointment.
Read on below for more detailed information.
Please note, information articles are not a substitute for direct medical advice. If you have any concerns, please seek personalised advice from a doctor.
See also our article:
What Should My Child Eat and Drink When They Are Ill?
Unwell Child
It is always worrying when your child is unwell. Having some knowledge of what to look out for and when to seek help is really important. At Kent Family Medical, we offer a range of appointments throughout the week that can be booked on the day, for children of all ages. As parents ourselves, we understand how important it is to have access to the right help at the right time. If you cannot find an available appointment online then please do call us – we will always try to be as flexible as possible. In the meantime, here is some information about common childhood illnesses, how long we would expect them to last, worrying symptoms to look out for and when to seek help.
If your child is known to have a weakened immune system due to an underlying medical condition, or treatment that they are receiving, then it is important to seek help quickly if they become unwell.

How long do common viral illnesses last? When should I be worried?
Especially during the autumn and winter months, viral infections in children are very common. Most coughs, colds and sore throats will be caused by viruses and so won’t need antibiotics (antibiotics treat bacterial infections). It is important to monitor children who have viruses to ensure that they are not struggling with their breathing, becoming too lethargic / tired or becoming dehydrated. If they are, then they may need supportive treatments until they feel better.
It is also important to make sure that common illnesses are not lasting longer than we may expect – if they are, then we would always recommend a review by a doctor, to ensure there is nothing else going on and to see if we need to give a specific treatment.
Below is a list of common conditions / symptoms, how long they should last and when to seek help. If your child has any of the below symptoms that are lasting longer than we would expect, or if they have any worrying symptoms, they should see a doctor. They should also see a doctor if you are particularly concerned – no one knows your child better than you do – always trust your instincts.
1. Viral sore throat
Expected duration: Up to 2 weeks (seek advice if not improved after 1 week)
Worrying symptoms / when to seek help:
- High temperature.
- Pus / exudate on tonsils.
- Persistent sore throat in the absence of a cough or cold.
- If your child is struggling with their breathing, using extra muscles to help them breath, becoming tired / floppy (see video below).
- Drinking less and passing less urine than normal.
Call 999 if your child :
- Is unable to swallow
- Is drooling
- Has severe symptoms that are getting worse quickly
- Is making a high-pitched sound when they breathe (called stridor).
More information can be found here: www.nhs.uk/conditions/sore-throat/
2. Common Cold
Expected duration: 10-14 days
Worrying symptoms / when to seek help:
- If your child is struggling with their breathing, using extra muscles to help them breathe, becoming tired / floppy.
- Drinking less and passing less urine than normal.
- High fevers (see below).
More information can be found here: www.nhs.uk/conditions/common-cold/
3. Fevers
Expected duration: No more than 5 days – consider review after 3 days.
Worrying symptoms / when to seek help:
- If your child is struggling with their breathing, using extra muscles to help them breath (see below), becoming tired / floppy.
- Drinking less and passing less urine than normal.
- If your child is under 3 months old and has a temperature of 38C or higher.
- Is 3-6 months old and has a temperature of 39C or higher.
- Temperature not coming down with paracetamol and ibuprofen.
Call 999 if your child has:
- A stiff neck
- Has a rash that doesn’t fade when you press a glass against it.
- Is bothered by the light
- Has a fit (febrile seizure)
- Unusually cold hands and feet
- Blotchy skin or blue / pale lips or tongue
- Has an abnormal cry
- Is very agitated
- Is very flopping / not responding as they normally do
More information can be found here: www.nhs.uk/conditions/fever-in-children/
4. Earache
Expected duration: 3 days (seek advice if lasting longer than this)
Worrying symptoms / when to seek help:
- Pain in both ears, discharge from one or both ears, swelling around the ear, fever, hearing loss, something stuck in the ear.
- If your child is struggling with their breathing, using extra muscles to help them breathe, becoming tired / floppy
- Drinking less and passing less urine than normal
More information can be found here: www.nhs.uk/conditions/earache/
5. Conjunctivitis
Expected duration: 1-2 weeks (seek help if persisting despite bathing the eye with cooled, boiled water)
Worrying symptoms / when to seek help:
- If your child is less than 28 days old.
- If they wear contact lenses.
- If the eye is painful rather than a bit irritated.
- If the eyes are very red.
- Changes in vision.
- Sensitive to light.
More information can be found here: www.nhs.uk/conditions/conjunctivitis/
6. Diarrhoea and vomiting
Expected duration: 2 days for vomiting, 7 days for diarrhoea
Worrying symptoms / when to seek help:
- Signs of dehydration:
- Reduced fluid intake and urine output / fewer wet nappies nappies
- Dry lips
- Lethargy
- Sunken soft spot (fontanelle) in babies
- Blood in the diarrhoea / bleeding from the bottom.
- High fevers.
- If your child appears to have discomfort in their abdomen.
Call 999 if you child:
- Has a sudden severe pain in their stomach or head.
- Is sensitive to the light / has a stiff neck.
- May have swallowed something poisonous or harmful / corrosive.
- Has green / dark brown vomit or vomits blood.
- More information can be found here: www.nhs.uk/conditions/diarrhoea-and-vomiting/
7. Coughs in children
There are a lot of conditions that can cause a cough in children. The commonest is a viral infection, or when mucous is trickling down the back of their throat with a cold. Asthma and allergies can cause coughs and so can specific infections like croup, bronchiolitis or, very rarely, pneumonia.
Expected duration of viral cough: Up to 3 weeks
Worrying symptoms / when to seek help:
- If your child is struggling with their breathing, using extra muscles to help them breathe, becoming tired / floppy.
- Drinking less and passing less urine than normal.
The NHS has produced some very useful information sheets for parents whose children have a feverish illness, cough or respiratory symptoms. Here are two examples below:
Useful Resource
The NHS has produced some very useful information sheets for parents whose children have a cough or respiratory symptoms. Here are two examples below:


Video – Difficulty Breathing and Wheeze in Infants and Children
Below is a really useful video with Dr Ranj – showing what to look out for when you are worried about your child’s breathing:
My child seems to be getting sick a lot – should I worry about their immune system?
This is something that parents often ask. It is quite normal for a child to get 8 or more coughs and cold a year – especially if they attend nursery or have older siblings at school or nursery. As long as your child is well in between these episodes, growing normally and has plenty of energy, it is very unlikely that there is anything to worry about. If you are concerned, however, do book an appointment with a doctor to talk things through.
I have heard about the ‘glass test’ – how do I do this and what does it mean?
The glass test is a test to look for, what doctors call, a ‘petechial rash’. This is a rash that doesn’t go away when you press it, because it is caused by small collections of blood under the skin. Rashes are very common when children are unwell, but a rash that doesn’t go away when you press it, can be a sign of meningococcal septicaemia (blood infection in meningitis) or other serious illnesses. These are normally present in children who are very unwell. We advise that you use a glass to identify this rash so you can press on the rash and see it at the same time.
You can perform a glass test as below:
- Press the side of a clear glass firmly against the skin
- Spots/rash may fade at first
- Keep checking
- Fever with spots/rash that do not fade under pressure is a medical emergency
- Do not wait for a rash. If someone is ill and getting worse, seek medical attention immediately.
You can read more about the glass test at:
– www.meningitisnow.org/meningitis-exaplained/signs-and-symptoms/glass-test/
You can find more information about childhood illnesses and some really useful resources and tips at: www.what0-18.nhs.uk
Please note that information articles are not a substitute for direct medical advice. If you have any concerns, please seek personalised advice from a doctor.