Cantharidine Treatment Singapore

Dr. Liew Hui Min

accredited consultant dermatologist

Cantharidine treatment involves applying a naturally derived substance from blister beetles directly onto specific skin growths. It is commonly used by dermatologists to treat stubborn warts and molluscum contagiosum that have not responded to other treatments. The solution causes a controlled blister to form under the growth, which helps it separate and fall off. The application is painless and requires no anaesthesia.

Indications Benefits Techniques Preparation Procedure Recovery Risks FAQ

Indications for Cantharidine

Dermatologists may recommend cantharidine treatment for several specific skin conditions:

Plantar warts on the feet: These thick, often painful warts on the soles of the feet can be particularly stubborn and may respond well to cantharidine when other treatments have been unsuccessful.

Common warts on hands and fingers: Warts in these areas can be difficult to treat with other methods, especially when they are located near nail beds or in areas where healing may be challenging.

Molluscum contagiosum: This viral skin condition, particularly common in children, creates small, dome-shaped bumps that can spread across the body and may benefit from cantharidine treatment.

Warts resistant to other treatments: Some warts that have not responded to initial treatments like cryotherapy (freezing) or topical medications may be suitable for cantharidine application.

Benefits of Cantharidine

Cantharidine treatment offers several advantages that make it particularly suitable for certain patients and skin conditions.

Comfortable application

The cantharidine is simply painted onto the skin growth, making it suitable for children or patients who are anxious about discomfort during treatment.
No injections required

The application itself causes no immediate pain, so there is no need for anaesthesia or numbing agents during the procedure.
Targeted treatment

The dermatologist can apply cantharidine exactly where needed, minimising impact on surrounding healthy skin tissue.
Multiple lesions can be treated

Several growths can be addressed during the same appointment, making it an efficient option for patients with multiple warts or molluscum bumps.

Cantharidine Treatment Techniques

Cantharidine treatment follows a straightforward application method that can be adapted based on the specific condition being addressed.

Standard application

The dermatologist applies cantharidine solution directly onto the surface of the wart or skin growth using a small applicator, ensuring coverage of the affected area.

Combined treatment approach

Some dermatologists may use cantharidine mixed with other compounds like podophyllin or salicylic acid to enhance treatment outcomes for particularly stubborn lesions.

Occlusive covering

After application, the treated area is covered with tape or a bandage for 4-6 hours to keep the solution in place and enhance its penetration into the skin growth.

Preparing for Cantharidine

Preparation for cantharidine treatment requires minimal advance planning from patients.

Medical history discussion: Your dermatologist will review your previous treatments for the skin condition and any allergies or sensitivities you may have to topical medications.

Treatment area examination: The area will be assessed to determine the size, location, and number of lesions that require treatment.

Skin cleaning: The skin around the growth will be gently cleaned to remove any debris or topical products that might interfere with the cantharidine application.

What to Expect During Cantharidine Procedure

The cantharidine application process is typically completed within a few minutes and involves several straightforward steps.

Skin preparation

The dermatologist will clean the area around the wart or lesion and may trim away any thick, dead skin to improve cantharidine penetration.

Medication application

Using a small brush or applicator, the dermatologist will carefully paint the cantharidine solution directly onto the skin growth, avoiding contact with surrounding healthy skin.

Protective covering

The treated area is immediately covered with tape or a bandage to keep the medication in place and prevent it from spreading to other areas.

Home care instructions

You will receive specific instructions about keeping the area dry and when to remove the covering, typically after 4-6 hours for most areas or 2-4 hours for facial treatments.

After Care and Recovery

Immediate Care

Bandage removal: Remove the covering after the specified time period (usually 4-6 hours) and wash the area gently with soap and water to remove any remaining cantharidine.

Blister development: A blister will typically form within 24-48 hours after treatment, which is the intended response and indicates the treatment is working properly.

Recovery Timeline

First week: The blister will gradually increase in size and may cause some discomfort, but should not be punctured or drained unless specifically instructed by your dermatologist.

Second week: The blister will begin to dry out and form a scab, with the underlying wart or lesion starting to separate from the healthy skin beneath.

Complete healing: Full healing typically occurs within 2-4 weeks, with the treated growth falling off naturally as new healthy skin forms underneath.

Follow-up Care

Progress monitoring: Your dermatologist will schedule a follow-up appointment to assess healing and determine whether additional treatment sessions are needed.

Potential Risks and Complications

Cantharidine treatment is generally well-tolerated. Controlled blistering is expected at the treatment site. Some patients may experience mild discomfort as the area heals. Changes in skin colour (darker or lighter) may occur but usually fade over time. There is a small risk of infection if the area is not kept clean. To ensure safe and effective treatment, cantharidine should be applied by a qualified dermatologist in Singapore.

Frequently Asked Questions

Will I need multiple treatments for my warts to disappear completely?

Some patients see complete resolution after one treatment, whilst others may require multiple sessions spaced several weeks apart, particularly for larger or more stubborn growths.

How much will the blister hurt as it develops?

Most patients experience mild to moderate discomfort as the blister forms, similar to having a small burn or tight feeling in the area. Over-the-counter pain relief can help if needed.

Can I spread my warts to others after cantharidine treatment?

The treated warts remain potentially contagious until they completely fall off and heal. Continue washing hands after touching the area and avoid sharing towels or footwear.

Will the treatment leave a scar?

Most patients heal without scarring when proper aftercare is followed. Avoiding picking or scratching the treated area helps minimise the risk of permanent marks.

When can I return to exercise or swimming?

You can resume normal activities once the blister has healed and the scab has fallen off naturally, typically 2-3 weeks after treatment.

Dr Liew Hui Min

Dually Accredited Dermatologist In Singapore and the UK

Dr. Liew Hui Min is an accredited consultant dermatologist from the Ministry of Health and the General Medical Council UK.

Her clinical interest includes:

Paediatric Dermatology,
Women’s Dermatology,
General Adult Dermatology.

Having trained in major London Hospitals, Dr Liew returned to Singapore in 2014 as a Consultant at KK Women’s and Children’s Hospital (KKH) where she specialised in paediatric, women, obstetric and vulva dermatology. Currently, Dr Liew practices at The Skin Drs. clinic located at Gleneagles Hospital.

Read Full Bio

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Our Clinic

The Skin Drs clinic - Dermatologist in Singapore

Gleneagles Medical Centre

6 Napier Road, #06-01
Singapore 258499

T:+65‎ 6970‎ 8681

T:+65 6970 8682

M:+65 8686 2445

F: +65 6970 8683

Mon to Fri (8am – 12pm; 1pm – 4pm)
Sat (8am – 12pm, by appointment only)

Cantharidine Treatment Singapore

Dr. Liew Hui Min

Indications for Cantharidine

Benefits of Cantharidine

Comfortable application

No injections required

Targeted treatment

Multiple lesions can be treated