Summary

  • Molluscum contagiosum is a mild, harmless viral skin infection.
  • Molluscum contagiosum in children is common and results from close contact with other children who have the infection.
  • It is a sexually transmissible infection (STI) in adults as it can be spread by skin-to-skin contact, during sexual contact.
  • It is characterised by small, smooth, round, pearly lumps with a central core.
  • The infection usually resolves itself, but treatment can shorten the length of symptoms.
  • Your sexual partners do not need treatment if they have no symptoms.
  • Testing for other STIs is recommended.
Molluscum contagiosum is a viral skin infection caused by the molluscum contagiosum virus. It is a sexually transmissible infection (STI) in adults as it can be spread by skin-to-skin contact, during sexual contact. A person can also spread them around their body by scratching, especially in areas where the skin is broken. Occasionally, bathing, towels and other objects can spread molluscum contagiosum.

Molluscum contagiosum in children is common and results from close contact with other children who have the infection.

Symptoms of molluscum contagiosum


molluscum contagiosum may cause small lumps or lesions (around 1–5 mm in diameter) to appear on the skin of the thighs, genitals and abdominal area. It usually does not affect other parts of your body.

The lesions:
  • are painless, but may be slightly itchy
  • often have a tiny central indentation
  • can be numerous and cover thighs, genital and abdominal area
  • will eventually resolve without treatment (are ‘self-limiting’) within a few months.

Diagnosis of molluscum contagiosum


Molluscum contagiosum can be mistaken for genital warts or pimples. If you notice any unusual skin lesions, it is recommended that you see your doctor or other experienced health professional for an accurate diagnosis. There is no test for molluscum contagiosum – it is diagnosed by the lesions’ appearance only. Your health professional may recommend tests for STIs at the same time if you have molluscum contagiosum.

Treatment of molluscum contagiosum


Treatment is available, although molluscum contagiosum will eventually clear up by itself if left untreated. The lesions are usually treated with liquid nitrogen, which freezes the lesion. This helps reduce the length of time that symptoms are present.

Liquid nitrogen treatment:
  • Is commonly available from your local doctor or sexual health centre
  • Is cosmetic and it is not a cure, as the virus remains on the skin until your immune system has got rid of it
  • Usually, only a single treatment is needed. However, it may take a couple of weeks for the lumps to disappear after freezing with liquid nitrogen.
People with suppressed immune systems may take longer for molluscum contagiosum to clear. Sexual partners of a person with molluscum contagiosum do not need treatment if they have no lesions on their body.

Complications of molluscum contagiosum


Bacterial infections can complicate molluscum contagiosum, however, this is rare. To lessen the risk of bacterial infection or the spread of molluscum contagiosum, do not pick, squeeze or irritate the lesions. There is no need to apply creams or lotions, just keep up your usual hygiene practices.

If molluscum contagiosum is not treated


Molluscum contagiosum is a mild, ‘self-limiting’ skin infection. Without treatment, it can persist for several months, but will eventually resolve. The duration, severity and length of treatment of molluscum contagiosum varies from person to person.

Where to get help

  • Melbourne Sexual Health Centre Tel. (03) 9341 6200 or 1800 032 017 or TTY (for the hearing impaired) (03) 9347 8619
  • Your doctor

Things to remember

  • Molluscum contagiosum is a mild, harmless viral skin infection.
  • It is characterised by small, smooth, round, pearly lumps with a central core.
  • The infection usually resolves itself, but treatment can shorten the length of symptoms.
  • Your sexual partners do not need treatment if they have no symptoms.
  • Testing for other STIs is recommended.
References
  • Molluscum contagiosum, Melbourne Sexual Health Centre. More information here.
  • Molluscum contagiosum, Infectious Diseases Epidemiology and Surveillance (Blue Book), Department of Health, Victorian Government. More information here.
  • Sexually transmissible infections – treatment is good, prevention is best, Department of Health, Victorian Government. More information here.

More information

Skin

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Burns, sores and infections

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This page has been produced in consultation with and approved by: Melbourne Sexual Health Centre

Last updated: August 2014

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Content on this website is provided for education and information purposes only. Information about a therapy, service, product or treatment does not imply endorsement and is not intended to replace advice from your doctor or other registered health professional. Content has been prepared for Victorian residents and wider Australian audiences, and was accurate at the time of publication. Readers should note that, over time, currency and completeness of the information may change. All users are urged to always seek advice from a registered health care professional for diagnosis and answers to their medical questions.