Treatment of Warts

Introduction to Wart Treatment

• The primary goal of wart treatment is to reduce wart size and alleviate functional/cosmetic problems, with treatment outcomes varying depending on the population and intervention 1, 2, 3, 4
• The Centers for Disease Control and Prevention recommends considering pregnancy status when selecting a treatment, and avoiding podofilox, podophyllin, and imiquimod 3

Treatment Options

• The British Journal of Dermatology and the Centers for Disease Control and Prevention (CDC) recommend salicylic acid (15-26%) for patient self-application or cryotherapy with liquid nitrogen for provider-administered treatment as first-line treatments for warts, with efficacy rates of 45-88% and 63-88% respectively 1, 2
• Cryotherapy with liquid nitrogen has an efficacy rate of 63-88% for wart treatment, with a cure rate of 14-30% for plantar warts specifically 1
• Other treatment options have the following efficacy rates:
• Combination therapy of cryotherapy with salicylic acid may improve outcomes, with an efficacy rate of 86% clearance rate when combining cryotherapy with salicylic acid 1

Treatment Application and Duration

• Cryotherapy with liquid nitrogen should be applied every 2 weeks for 3-4 months, using a gentle freeze-thaw cycle of 15-30 seconds per application, with prior debulking of the wart, as recommended by the British Journal of Dermatology 1
• Salicylic acid 15-40% can be applied daily after paring for 3-4 months as an alternative to cryotherapy, with a moderate strength of evidence 1
• Other treatment application and duration guidelines:

Treatment Monitoring and Outcomes

• Treatment monitoring involves changing treatment if no substantial improvement after three provider-administered treatments or if warts haven't cleared after six treatments, with consideration of patient factors and treatment outcomes, and a moderate strength of evidence 5, 3, 4, 2
• Recurrence rates may be 13-39% depending on treatment, with specific rates for:
• Spontaneous resolution occurs in 20-30% of cases within 3 months, making watchful waiting an acceptable alternative for some patients, especially in children, with a moderate strength of evidence 3, 4, 2, 1

Side Effects and Precautions

• Warn patients that cryotherapy is painful and blistering may occur, with local skin reactions, such as erythema, edema, and blistering, being common and expected side effects of wart treatments 1, 3
• Use caution when applying cryotherapy near cutaneous nerves and tendons, and avoid overtreatment with caustic agents like TCA/BCA to prevent damage to surrounding healthy tissue 1, 2, 4
• Scarring is uncommon but possible, especially with insufficient healing time between treatments, and chronic pain syndromes may develop at treatment sites, though rarely 3
• Patient factors, such as pregnancy and immunocompromised status, should be considered when selecting a treatment option, with podofilox, podophyllin, and imiquimod being avoided in pregnancy, and TCA/BCA or cryotherapy being preferred 3, 2, 4, 5

Treatment Options Summary