Childhood rashes are very common and often nothing to worry about. Most rashes are harmless and go away on their own.
However, if your child has developed a rash and seems unwell, or if you're worried, you should see your doctor to find out the cause and for any necessary treatment.
The following guide may give you a better idea of the cause of the rash, but do not use this to self-diagnose your child's condition – always see a doctor for a proper diagnosis.
This page covers the most common causes of rashes in children, which are:
- prickly heat
- erythema multiforme
- keratosis pilaris ("chicken skin")
- hand, foot and mouth disease
- molluscum contagiosum
- pityriasis rosea
- slapped cheek syndrome
You can follow the below links for more information on these conditions.
The causes of skin rashes in babies are covered separately.
Chickenpox is a mild and common viral illness that most children catch at some point. It causes a rash of red, itchy spots that turn into fluid-filled blisters. They then crust over to form scabs, which eventually drop off. Some children have only a few spots, but in others they can cover the entire body.
Learn more about the symptoms of chickenpox.
Atopic eczema commonly occurs behind the knees or on the front of the elbows. It is not a serious condition but if your child later becomes infected with the herpes simplex virus, it can cause the eczema to flare up into an outbreak of tiny blisters, called eczema herpeticum, and will cause a fever.
Impetigo is a highly contagious bacterial infection of the surface layers of the skin that causes sores and blisters. It is not usually serious. There are two types:
- bullous impetigo – which causes large, painless, fluid-filled blisters
- non-bullous impetigo – which is more contagious and causes sores that quickly burst to leave a yellow-brown crust
If you think your child has impetigo, see your doctor for a prescription of antibiotic cream, which should clear the infection within seven to 10 days.
Ringworm is a common fungal skin infection that causes a ring-like red rash on the skin. The rash can appear almost anywhere on the body, with the scalp, feet and groin being common areas.
Ringworm isn't serious and is usually easily treated using creams that you can buy from the pharmacy.
Prickly heat (heat rash)
A heat rash (prickly heat) may flare up if your child starts to sweat, for example because they are dressed in too many clothes or the environment is hot and humid. They may develop tiny red bumps and blisters on their skin, but these will soon clear.
Erythema multiforme is a skin reaction triggered by medication, an infection (usually the herpes simplex virus) or an illness. Red spots develop on the hands or feet before spreading across the body. Your child will probably feel unwell and may have a fever, but you should be able to treat these symptoms with over-the-counter medicine. It may take between two and six weeks before they feel better.
See your doctor if your child has a rash and seems unwell.
Keratosis pilaris ("chicken skin")
Keratosis pilaris is a common and harmless condition where the skin becomes rough and bumpy, as if covered in permanent goose pimples.
It typically begins in childhood and gets worse in adolescence, around puberty. Some people find that it improves after this and may even disappear in adulthood.
There's no cure for keratosis pilaris, but it shouldn't bother your child.
Hand, foot and mouth disease
Hand, foot and mouth disease is a common, mild illness caused by a virus. It causes a non-itchy rash on the palms of the hands and soles of the feet, and can sometimes cause mouth ulcers and a general feeling of being unwell.
Treatment is usually not needed as the child's immune system clears the virus and symptoms go away after about seven to 10 days. However, hand, foot and mouth disease is easily spread.
Molluscum contagiosum is a viral skin infection that commonly causes clusters of small, firm, raised spots on the skin.
It commonly affects young children aged one to five years, who tend to catch it after close physical contact with another infected child.
The condition is usually painless, although some children may feel some itchiness. It usually goes away within 18 months without the need for treatment.
Molluscum contagiosum is highly infectious. However, most adults are resistant to the virus, meaning they are unlikely to develop the condition if they come into contact with it.
Pityriasis rosea is a relatively common skin condition that causes a distinctive skin rash of raised, red scaly patches across the body. Most cases occur in older children and younger adults between 10 and 35 years old.
Pityriasis rosea usually clears up without any treatment within 12 weeks.
Find out more about the symptoms of pityriasis rosea.
Scabies is an infectious skin condition caused by tiny mites that burrow into the skin. It causes an intensely itchy rash.
Children tend to catch it after close physical contact with another infected adult or child – for example, during play fighting or hugging.
The mites like to burrow in warm places on the skin. They leave small red blotches and silver lines on the skin, which may be found on the palms of the hands or soles of the feet. In infants, it's common to find blisters on the soles of the feet.
See your doctor for treatment (a lotion or cream) if you think your child has scabies.
Find out more about the symptoms of scabies.
Hives (also known as urticaria) is a raised, red, itchy rash that appears on the skin. It happens when a trigger (see below) causes a protein called histamine to be released in the skin. Histamine causes redness, swelling and itching.
Hives can be triggered by many things, including allergens (such as food or latex), irritants (such as nettles), medicines or physical factors, such as exercise or heat. But usually no cause can be identified.
It's a common skin reaction that's likely to affect children. The rash is usually shortlived and mild, and can often be controlled with antihistamines.
Slapped cheek syndrome
Slapped cheek syndrome (also known as fifth disease) is a common childhood viral infection that typically causes a bright red rash on both cheeks. It usually affects children aged between three and 15.
Most children won't need treatment as slapped cheek syndrome is usually a mild condition that passes in a few days.
Psoriasis is a skin condition that causes red, flaky, crusty patches of skin covered with silvery scales.
It may be just a minor irritation for some children who are affected, but for others it has a major impact on their quality of life.
There is no cure for psoriasis, but a range of treatments can improve symptoms and the appearance of the affected skin patches.
Find out more about the symptoms of psoriasis.
Cellulitis is a bacterial infection of the deeper layers of the skin and the underlying tissue. The affected area of skin will be red, painful swollen and hot. Your child will probably also have a fever.
Cellulitis can affect people of all ages, including children, and usually responds well to treatment with antibiotics.
Find out more about the symptoms of cellulitis.
Measles is a highly infectious viral illness. Anyone can get measles if they haven't been vaccinated or had it before, but it's most common in children aged between one and four years old.
It causes a red-brown spotty rash, which tends to start behind the ears and spread to the head, neck, legs and rest of the body. Your child will usually also have cold-like symptoms and a fever.
Most childhood rashes are not measles, but you should see your doctor if you notice the above signs. Learn more about the symptoms of measles.