Management of Pediatric Common and Plantar Warts

First‑Line Keratolytic Therapy

Topical salicylic acid (15 %–40 %) applied daily after gentle paring is the most evidence‑based first‑line option for children with common and plantar warts, offering the best balance of efficacy and tolerability (Strength of Recommendation A)【1】【2】.
Treatment should be continued for 3–4 months to achieve optimal clearance【3】【4】.
Occluding the salicylic‑acid preparation (e.g., with a waterproof dressing) enhances drug penetration and improves outcomes【3】【4】.
For plantar warts, higher concentrations (15 %–40 %) are advised because of the thicker cornified layer at this site【1】【5】.
Meta‑analysis shows salicylic acid increases wart clearance (RR 1.60; 95 % CI 1.15–2.24) with pooled cure rates of 49 % versus 23 % for placebo【6】.
Salicylic acid is contraindicated on the face due to risk of irritant burns and scarring, and should be avoided on areas with poor healing (e.g., neuropathic feet)【6】.

Painful interventions should be avoided whenever possible in young children, as most warts resolve spontaneously within 1–2 years, making watchful waiting a reasonable option for asymptomatic lesions【1】【2】.

Gentle cryotherapy applied fortnightly for 3–4 months is recommended when salicylic acid fails or is not tolerated (Strength of Recommendation B)【1】【2】.
In children, milder freezing techniques (shorter freeze time, lower intensity) are used to minimise pain and blistering【1】.
Each freeze should last 15–30 seconds, with repetitions every 2–4 weeks【3】【4】.
Cryotherapy yields higher cure rates than salicylic acid for hand warts (46 % vs 17 %) but causes significantly more pain and blistering, limiting its suitability for young children【6】.
For plantar warts, both cryotherapy and salicylic acid show modest efficacy (≈14 % cure in a large trial)【6】.

Combining salicylic acid with gentle cryotherapy can maintain high efficacy while reducing side‑effects; one study reported an 86 % clearance rate【6】.

5‑Fluorouracil 5 % cream applied once or twice daily under occlusion for 4–12 weeks is safe and well‑tolerated in children (Strength C‑D)【3】.
Cantharidin 0.7 % solution applied every 3 weeks (up to four applications) is an option for difficult warts【3】.
Cidofovir 1 % cream applied daily for 5 days each week under occlusion for 8 weeks can be considered【3】【1】.
Formaldehyde or glutaraldehyde solutions have been used as topical agents in resistant cases【1】【2】.
Pulsed‑dye laser therapy after paring is another modality for refractory lesions【3】.
Topical immunotherapy is reserved for extensive or recalcitrant warts【1】【2】.

Cure rates are lower at the plantar site because of the thick cornified layer and limited drug penetration【1】【5】.
Aggressive paring before any topical or destructive therapy is essential, but care must be taken not to damage surrounding skin to avoid spread of infection【1】【5】.

Use lower‑strength salicylic acid formulations (2 %–10 % cream/ointment) or cautiously apply 12 %–17 % paint without occlusion to minimise burn risk【1】【7】.
Apply milder cryotherapy freezes on the face to reduce scarring potential【1】.
Destructive or caustic agents are more likely to cause scarring on facial skin and should be used only with extreme caution【1】【7】.

Duct‑tape occlusion, homeopathy, herbal remedies, hypnotherapy, H₂‑receptor antagonists, zinc oxide/sulfate preparations, and silver nitrate have no convincing efficacy data and should not be routinely employed【4】【2】【8】【1】.

Do not employ aggressive cryotherapy in young children because of pain intolerance and scarring risk【1】【2】.
Avoid salicylic‑acid paints on the face to prevent chemical burns【6】.
Do not damage surrounding skin during paring, as this can spread the infection【1】【5】.
Recognise that spontaneous resolution is common; watchful waiting is appropriate for asymptomatic warts【1】【2】.