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    1. Home
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    4. A to Z

    Molluscum contagiosum (MC)

    Molluscum contagiosum (MC) is a viral infection that affects the skin. It most commonly affects children, but can occur at any age. It’s generally harmless and should get better in a few months without specific treatment.

    Symptoms of molluscum contagiosum

    Usually, the only symptom of molluscum contagiosum (MC) is a number of small, firm, raised papules (spots) on the skin, with a characteristic small dimple in the middle.

    The spots aren't painful, but can be itchy.

    The spots may develop in small clusters and can be spread across different parts of the body.

    They're most often found:

    • in the armpit
    • behind the knees
    • on the groin

    MC can affect a person on more than one occasion, but this is uncommon.

    It’s common for it to spread around the body and can take up to 18 months to clear completely.

    When to seek medical advice

    See your GP if you notice the spots associated with MC. They're usually easy to recognise, so they should be able to diagnose the condition without the need for further tests.

    If your GP thinks the infection may be caused by something other than MC, they may want to:

    • take a skin sample (biopsy) from one of the spots to test it for the molluscum contagiosum virus (MCV)
    • refer you to a sexual health clinic to be tested for sexually transmitted infections (STIs)

    They may refer you to a specialist in hospital if you have:

    • spots on your eyelids, near your eye, or your eye is red or painful
    • HIV and your symptoms are severe
    • a weakened immune system for another reason – such as receiving chemotherapy

    Causes of molluscum contagiosum

    MC is caused by a virus known as the molluscum contagiosum virus (MCV).

    This virus can be spread through:

    • close direct contact, such as touching the skin of an infected person
    • touching contaminated objects, such as towels, flannels, toys and clothes
    • sexual contact – this includes intimate physical contact as well as sexual intercourse

    If you become infected by the virus and spots appear on your skin, the virus can also spread to other areas.

    It's not known exactly how long someone with MC is contagious for. It's thought the contagious period may last up until the last spot has disappeared.

    Treating molluscum contagiosum

    Routine treatment for MC, particularly in children, is generally not recommended because:

    • the infection usually clears up on its own
    • the infection doesn't normally cause any symptoms other than the spots
    • the infection doesn't usually interfere with everyday activities, such as going to work, swimming or playing sports
    • treatments can be painful and may cause scarring or damage to the surrounding skin

    Treatment is usually only recommended for older children and adults when the spots are particularly unsightly and affect quality of life, or for people with weakened immune systems.

    In such cases, treatments that may be offered include:

    • liquids, gels or creams that are applied directly to the skin
    • minor procedures such as cryotherapy (where the spots are removed by freezing them)

    Preventing the spread of molluscum contagiosum

    Although MC is infectious, the chance of passing it on to others during normal activities is small.

    It's not necessary to:

    • stay away from work, school or nursery
    • stop doing activities such as swimming

    You should take steps to avoid spreading the virus to other people. You should:

    • avoid squeezing or scratching the spots – as well as increasing the risk of the infection spreading, this can cause pain, bleeding and can lead to scarring
    • keep affected areas of skin covered with clothing whenever possible – a waterproof bandage can be put over the area if you go swimming
    • avoid sharing towels, flannels and clothing
    • avoid sharing baths

    Using a condom while having sex can reduce the risk of passing on MC during sexual contact.

    Complications of molluscum contagiosum

    MC rarely causes any other problems, but complications can occasionally occur. These include:

    • a bacterial infection, which may require treatment with antibiotics
    • scarring – after MC has healed and cleared, small patches of paler skin or tiny indented scars may be left behind; this is more likely if the spots became infected or after treatment
    • eye problems – a secondary eye infection may develop, such as conjunctivitis or keratitis, which may cause your eyes to become sore and sensitive to light

    See your GP if you suspect a bacterial infection or experience any eye problems. Signs of a bacterial infection can include redness, swelling and pain in the skin and underlying tissue.

    • Molluscum contagiosum (MC)

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    The information on this page has been adapted from original content from the NHS website.

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