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Ringworm is a common and highly infectious 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 sites.
The condition, medically known as "tinea", isn't serious and is usually easily treated using creams sold by the pharmacy. However, ringworm is highly contagious and easily spread among people.
Despite its name, it doesn't have anything to do with worms. It's an infection of the skin caused by a fungus.
You need to see your doctor if you or your child have ringworm of the scalp. This type of ringworm is treated with antifungal tablets only available on prescription.
Other types of ringworm are generally treated with antifungal cream from the pharmacy and you don't need to see a doctor unless the infection persists. However, pharmacists often prefer children to see a doctor to confirm a diagnosis.
Read more about ringworm symptoms.
Ringworm is passed between people through direct skin contact and by sharing objects such as towels, hairbrushes and bedding.
Pets such as dogs and cats can have ringworm, which they can pass on to people they come into contact with.
Read more about the causes of ringworm.
Ringworm is common. It's estimated that 10-20% of people will have a fungal skin infection at some point during their lifetime.
People of all ages can be affected by ringworm, but children are particularly susceptible to it.
Scalp ringworm (tinea capitis) is most common in children who have not reached puberty (sexual maturity), particularly African-Caribbean children and those who live in urban areas.
Body ringworm can affect anyone of any age, although groin infections are more common in young men.
Most cases of ringworm are mild and can be treated using a pharmacy antifungal cream.
Scalp ringworm can be treated with antifungal tablets, sometimes combined with antifungal shampoo.
Sometimes, if ringworm leaves the skin irritated or broken it can lead to other bacterial infections, which may need treatment with antibiotics.
Read more about how to treat ringworm.
It's really important, where possible, to prevent spreading the infection. You should avoid sharing towels, bedding or clothes with anyone diagnosed with ringworm.
If you think your pet has ringworm, take it to the vet. If your pet is treated quickly, you will be less likely to catch the infection from it.
If your child has ringworm, they do not need to stay off school. However, you should inform the school your child has the condition. In addition to treatment, your child should maintain a good level of personal hygiene to prevent the infection spreading.
Read more about how to stop the spread of ringworm.
Ringworm often looks like a round, red or silvery patch of skin that may be scaly and itchy.
The ring spreads outwards as it progresses. You can have one patch or several patches of ringworm, and in more serious cases your skin may become raised and blistered.
The symptoms of scalp ringworm include:
In more severe cases, symptoms can also include:
In very severe cases of scalp ringworm, a large inflamed sore called a kerion may form on your scalp. This can ooze pus, and you may also have a fever and swollen lymph glands.
The symptoms of body ringworm include:
In more severe cases:
The symptoms of foot ringworm (athlete's foot) include:
And, in more severe cases:
Read more about athlete's foot.
The symptoms of groin ringworm (jock itch) include:
Exercising, walking and wearing tight clothing or underwear can make the symptoms of a groin infection worse.
It's also quite common to develop a groin infection in combination with athlete's foot. This can happen if you have athlete's foot and you scratch your foot and transfer fungal spores to your groin when dressing or going to the toilet.
The symptoms of nail ringworm include:
Read more about fungal nail infection.
Read more about how ringworm is diagnosed.
Ringworm is a skin infection caused by a fungus.
Ringworm is caused by fungi called dermatophytes, which live off keratin. Keratin is a tough, waterproof tissue found in many parts of the body, including the skin, nails and hair.
This is why ringworm infections mostly affect the skin, nails or scalp.
The fungi are tiny spores tough enough to survive for months on your skin, in soil or on household objects, such as combs or towels. The spores can be spread in four different ways:
As an adult, you can become a carrier of scalp ringworm without developing any symptoms. This is because your body has usually developed a defence against the infection by the time you reach adulthood.
If you are a carrier of a ringworm infection, you can unknowingly pass the condition onto children, who may then go on to develop symptoms.
You are more likely to develop ringworm if you:
Ringworm is usually easy to diagnose from its appearance and location.
Your doctor will usually be able to diagnose scalp ringworm after examining your scalp.
Knowing what type of fungus is causing the ringworm infection can be useful, as some types of antifungal medication are better at treating certain types of fungi. Your doctor will remove a small sample of skin from your scalp for testing in a laboratory.
You may be given an antifungal medication to start taking before you receive your test results. If the tests show a different antifungal medication would work better, you will be prescribed that and asked to stop taking the first one.
Most cases of body ringworm can be diagnosed by your doctor after examining your skin and asking you whether you have other symptoms that could be related.
Further tests will usually only be needed if your symptoms are severe or if they fail to respond to antifungal treatment. If this is the case, your doctor may remove a small piece of affected skin and send it to a laboratory to be analysed under a microscope.
Microscopic analysis will be able to show if fungi are present and the specific type causing your infection.
Read about how to treat ringworm.
Ringworm is easily treated using antifungal creams, tablets and shampoo.
The following self-help tips can also help get rid of ringworm and stop it from spreading:
Read more about preventing ringworm.
Scalp ringworm is usually treated using antifungal tablets, often in combination with an antifungal shampoo.
There are two main types of antifungal tablet:
The antifungal medicine your doctor prescribes will depend on the type of fungi causing the infection.
Most people with scalp ringworm are prescribed terbinafine. It's an effective treatment for most cases of ringworm. You usually need to take the tablets once a day for four weeks.
Side effects of terbinafine can include:
These side effects are usually mild and short-lived. Some people have also reported that terbinafine temporarily affected their sense of taste.
Griseofulvin is a type of antifungal medicine that works by preventing fungi from growing and multiplying. It is available in the form of a spray and is usually taken daily for between 8 and 10 weeks.
Side effects of griseofulvin can include:
However, these side effects should improve as your body gets used to the medicine.
Griseofulvin can cause birth defects so shouldn't be taken during pregnancy or if you intend to become pregnant soon after stopping treatment. Men shouldn't father a child within six months of stopping treatment.
Griseofulvin is also not suitable for women who are breastfeeding and those with severe liver disease or lupus.
Griseofulvin can interfere with both the combined contraceptive pill and the progestogen-only pill, so women need to use an alternative barrier form of contraception, such as a condom, while taking it.
Griseofulvin may also affect your ability to drive and can enhance the effects of alcohol.
Read more about griseofulvin.
Antifungal shampoo cannot cure scalp ringworm, but it can help prevent infection spreading and may speed up recovery.
Antifungal shampoos such as selenium sulphide is available from your pharmacist. Ideally, antifungal shampoo should be used twice a week during the first two weeks of treatment.
There is no evidence that shaving a child's head will reduce the risk of a ringworm infection or speed up recovery.
Most cases of body ringworm (including groin infections) can be treated using an over-the-counter antifungal cream, gel or spray. There are lots of different types, so ask your pharmacist to help choose the right one for you.
You usually apply antifungal creams, gels and sprays daily to the affected areas of skin for two weeks. The cream, gel or spray should be applied over the rash and to one inch of skin beyond the edge of the rash. Read the manufacturer's instructions first.
You may be advised to use the treatment for a further two weeks to reduce the risk of re-infection. See your doctor if your symptoms have not improved after two weeks of treatment as you may need antifungal tablets.
Both terbinafine and griseofulvin tablets can be used to treat body ringworm infections, as well as another antifungal medicine called itraconazole.
Itraconazole is usually prescribed in the form of capsules for 7 or 15 days. It is not recommended for use in children, elderly people or those with severe liver disease.
Side effects of itraconazole can include:
Read more about [itraconazole]&medicine=Sporanox&preparation=Sporanox%20100mg%20capsules).
Read about how to stop the infection coming back.
Fungal nail infections can be treated with antifungal nail paint or antifungal tablets. Antifungal tablets tend to work better than nail paints, although they can cause side effects such as headache, nausea and diarrhoea.
Read more about treating fungal nail infections.
If you or someone in your family has ringworm, following the advice outlined below will help stop the infection spreading.
To contract ringworm it is not necessary to have direct contact with an infected person or animal. This is because the fungi is able to survive on items such as furniture, hairbrushes, clothing and towels.
Therefore, if someone in your household has ringworm you should:
It is important other household members check themselves for signs of infection. If necessary, they should seek treatment.
If you suspect your pet is the source of the infection, take them to your vet for treatment. Patches of missing fur are a sign an animal has ringworm.
If someone in your family has ringworm, there is no need for them to stay off work or school. However, treatment should be started as soon as possible. Good personal hygiene should also be followed to stop it spreading to other children.
Find out more about how to treat ringworm.
Important: Our website provides useful information but is not a substitute for medical advice. You should always seek the advice of your doctor when making decisions about your health.