Does freezing work for plantar warts?
Short answer: Cryotherapy can clear some plantar warts, but it is not consistently superior to salicylic acid and often requires repeated painful treatments. Other destructive chemicals may be considered, although evidence and availability vary.
Liquid nitrogen creates controlled freezing injury. Treatment intensity, interval and number of sessions vary. Pain, blistering, temporary pigment change and, less commonly, scarring or nerve injury can occur. Thick plantar callus may be reduced beforehand.
Silver nitrate cauterises tissue and can stain skin. Cantharidin produces blistering and is commonly compounded with other agents in some countries; access and regulatory status vary. These treatments are not automatically stronger or more effective simply because the reaction looks dramatic.
Combination treatment—such as careful debridement with a keratolytic, or salicylic acid between cryotherapy sessions—may be used. The skin’s condition and the patient’s tolerance should guide intensity rather than a fixed escalation ladder.
When should I seek an assessment?
Consider assessment when the diagnosis is uncertain, the lesion is painful or changing, warts are spreading, self-care is unsafe, or reasonable treatment has failed. Chronic lesions should be re-examined before another destructive course is started.