Are plantar warts contagious?
Short answer: Yes, but transmission is not inevitable. HPV can spread by direct skin contact, contaminated surfaces or self-inoculation, particularly when skin is damp, macerated, cracked or traumatised.
The interval between exposure and a visible wart can be months, so it is usually impossible to identify exactly where it came from. Barefoot communal areas are plausible exposure sites, but warts can arise without a memorable pool or changing-room exposure.
Picking, cutting and shaving can spread infected tissue to adjacent skin. Avoid sharing pumice stones, files, socks or footwear used directly on a wart. Covering may be sensible in communal wet areas, but excessive occlusion can macerate the skin.
Household hygiene should be practical, not obsessive. Normal cleaning, handwashing after treatment, individual treatment tools and avoiding direct picking are reasonable. A wart does not mean someone is unclean.
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.