Molluscum contagiosum explained

What is molluscum contagiosum?

Molluscum contagiosum is a skin infection caused by a virus from the pox family. It produces small, firm, raised spots that are usually round and pearly or skin-coloured, often with a tiny dimple in the centre. The spots are typically a few millimetres across and can appear singly or in clusters, most commonly on the trunk, arms, legs, armpits or behind the knees, and in the genital area in adults. They are usually painless, though they can sometimes become itchy or inflamed. The infection is harmless and, importantly, self-limiting, meaning the body's immune system clears it in time. It is very common in childhood and is not a sign of poor hygiene or any underlying problem for most people.

How it spreads

The virus spreads through close contact. This includes skin-to-skin contact, such as during play, and sharing items that touch the skin, such as towels, flannels, bedding, clothing or bath water. Scratching or picking a spot can spread the virus to other areas of the same person's skin, a process called self-spread, which is why new spots often appear over time. In adults, spots in the genital area can be passed on through sexual contact. The infection is contagious for as long as the spots are present, but there is no need to keep children off school or nursery, and normal activities can continue. Simple measures, such as not sharing towels and covering spots where practical, reduce the chance of passing it on.

Why treatment is usually not needed

For most people, the best approach is to leave molluscum contagiosum alone and let it clear naturally. Each spot tends to last a few weeks to a few months, and because new ones can appear as older ones heal, the whole infection may take many months, sometimes a year or more, to disappear completely. This is normal and does not mean anything is wrong. Treatments to remove the spots are generally not recommended for children because they can be painful, may cause scarring, and offer little benefit over simply waiting, since the spots clear on their own. Squeezing or picking the spots is discouraged, as it can cause scarring, spread the virus, and introduce bacterial infection.

Gentle self-care

While you wait for the spots to clear, gentle care keeps skin comfortable and limits spread. Try not to scratch or pick the spots, and keep children's nails short to reduce accidental scratching. Cover spots with clothing or a plaster during activities where close contact is likely, such as swimming or contact sports, then remove the cover afterwards. Avoid sharing towels, flannels, bath water, clothing and bedding, and wash these regularly. If a spot becomes itchy or the surrounding skin is dry, a simple moisturiser can soothe it, and a pharmacist can advise on suitable products for itch. There is no need to keep a child away from school, nursery or swimming, as excluding them is not necessary and does not stop spread.

When to seek advice

Molluscum contagiosum rarely needs medical attention, but some situations are worth checking. See a pharmacist or GP if spots become very red, swollen, painful, or start weeping pus, which can suggest a bacterial infection needing treatment. Seek advice if spots appear on or near the eyelids or eye, if they are widespread and troublesome, or if you are unsure whether the spots are molluscum at all rather than another skin condition. Adults with spots in the genital area may wish to attend a sexual health clinic for confirmation and advice. Anyone with a weakened immune system should seek medical advice, as the infection can be more extensive or persistent. If you are ever worried about a spot that is changing, growing or bleeding, get it reviewed.