A verruca is simply a wart that is usually found on the soles of your feet, though they can also appear around the toes. In the early stages, a verruca looks like a small, dark, puncture mark but later turns grey or brown. It may become rough and bumpy with a cauliflower-like appearance and may develop a black spot in the middle, which is caused by bleeding. A verruca can grow to half an inch in diameter and may spread into a cluster of small warts.

Verrucae are caused by the human papiloma virus (HPV). This virus is very contagious, but can only be caught by direct contact. It thrives in warm, moist environments such as swimming pools, changing room floors and bathrooms. 

They are harmless. However, they can cause a sharp, burning pain if you get one on a weight-bearing area such as the ball or the heel of the foot. Because you are constantly pressing on the area when walking, they can protrude into the skin and become more painful.

What’s the difference between a corn and a verruca? A verruca is a viral infection, whereas a corn or callus are simply layers of dead skin. Verrucae tend to be painful to pinch, but if you’re unsure, your podiatrist will know.

Treatments include excisional surgery using a scalpel and Cryotherapy.

Cryogenic Clinic.  Cryotherapy involves freezing warts off with liquid nitrogen.  Liquid nitrogen is used for the safe, effective treatment of verruca, skin tags and warts.