Warthttps://en.wikipedia.org/wiki/Wart
Wart are small rough papules that are similar in color to the skin. They typically do not result in other symptoms, except when on the bottom of the feet, where they may be painful. While they usually occur on the hands and feet, they can also affect other locations. One or many warts may appear, but the lesions are not cancerous.

Warts are caused by infection with a type of human papillomavirus (HPV). Factors that increase the risk include use of public showers and pools, eczema and a weak immune system. The virus is believed to enter the body through skin that has been damaged slightly. A number of types exist, including "common warts", plantar warts, and genital warts. Genital warts are often sexually transmitted.

Warts are very common, with most people being infected at some point in their lives. The estimated current rate of non-genital warts among the general population is 1–13%. They are more common among young people. The estimated rate of genital warts in sexually active women is 12%.

A number of treatments may be used including salicylic acid applied to the skin and cryotherapy. In those who are healthy, they do not typically result in significant problems.

○ Treatment ― OTC Drugs
Among salicylic acid formulations, a brush type salicylic acid is better for the long time use. When applied, the drug spreads around, so it is better to apply a little narrower than the size of the affected area. Older warts are often deep, so deep warts may take months to treat. Cryotherapy may be another treatment option, but keep in mind that cryotherapy also takes a long time to treat warts. If the wart doesn't be removed completely, it can spread further through the wound.

#Salicylic acid, brush applicator [Duofilm]
#Salicylic acid, self-adhesive bandages
#Salicylic acid, tube application
#Freeze, wart remover
  • A large number of warts are present on the big toe
  • Multiple black dots are important findings that suggest warts.
  • Verruca vulgaris ― First toe
  • Verruca filiformis ; Warts around the eyes appear small. Typical case.
  • A filiform wart on the eyelid
  • When warts occur around the genitals, they are diagnosed as condyloma.
  • This is a typical plantar wart. The absence of a callus on the toe is an important finding. If a callus-like lesion occurs in a person without a previous history of callus, it is usually a wart.
  • The photo shows a plantar wart after treatment with salicylic acid.
  • Since it is a symmetrical lesion, callus should also be considered. The callus on the heel suggests that the patient may have walked a lot.
  • Plantar wart
References Plantar Warts: Epidemiology, Pathophysiology, and Clinical Management 29379975
Verrucae plantaris (plantar warts) are common skin diseases found on the bottom of the foot, caused by the human papillomavirus (HPV).
 Clinical guideline for the diagnosis and treatment of cutaneous warts (2022) 36117295 
NIH
It is a comprehensive and systematic evidence-based guideline and we hope this guideline could systematically and effectively guide the clinical practice of cutaneous warts and improve the overall levels of medical services.
 Cryosurgery for Common Skin Conditions 15168956
Skin diseases like actinic keratosis, solar lentigo, seborrheic keratosis, viral wart, molluscum contagiosum, dermatofibroma can be safely treated with cryotherapy (=freezing).
 Molluscum Contagiosum and Warts 12674451
Both molluscum contagiosum and warts are caused by viral infections. Molluscum contagiosum usually goes away on its own without causing further problems, but it can be more severe in people with weakened immune systems. Although lesions tend to disappear by themselves, treatment options like removal or immune system support can speed up recovery and reduce the risk of spreading the virus. Warts, caused by the human papillomavirus, lead to thickened skin growth. They come in different types depending on where they appear on the body. Treatment options include removal, medication, or immune system therapy.