Why Do Some Warts Become Chronic or Resist Treatment?

Why will my plantar wart not go away?

Short answer: A wart may persist because HPV evades immune recognition, the lesion is thick or mosaic, treatment has not reached infected tissue consistently, or the diagnosis or treatment strategy needs review.

Wart duration, size, number, site, immune status and previous treatments can influence response. The sole has a thick stratum corneum, and pressure may drive the lesion inward. No single treatment clears every wart.

Treatment failure does not always mean the previous clinician or patient did something wrong. Salicylic acid requires weeks of careful use; cryotherapy commonly requires repeated sessions; immune-based responses are unpredictable. Stopping too early and overtreating until the skin is damaged can both be counterproductive.

Chronic, painful or repeatedly treated warts deserve a fresh assessment: confirm the diagnosis, map every lesion, identify scarring or infection, review circulation and sensation, and decide whether another conservative course or a procedure such as Falknor’s needling or curettage is proportionate.

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.