Warts are non-cancerous growths that are caused by one of the strains of human papillomavirus, also known as HPV. The virus makes the top layer of skin thick and hard in that specific spot. As a result it triggers extra cell growth.
Image Source: DermNetNZ (StatPearls Publishing LLC)
On the flip side Plantar Wart typically grows inward on the sole or heel of your foot. Most common reasons for this is the pressure that's put on the heel due to consistent walking, running, or standing for longer periods of time. This makes plantar warts really the most uncomfortable ones.
Plantar warts are generally harmless for most people. However if you suffer from extreme pain or have any underlying condition that affects the immune system (such as HIV, diabetes etc), you should seek medical care immediately.
Plantar warts can be easily diagnosed by your medical professional by either just looking at it, scraping off little bit of the wart area, or by performing a biopsy.
Warts are actually contagious and can spread easily through direct or indirect contact due to HPV. While there may not be many ways to prevent them from happening, but there's a few things you can keep in mind to avoid getting a wart: