Verrucae
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. So if an infected bare foot walks across the poolside, it may release virus-infected cells onto the floor. If you then walk on the same floor, you can pick the virus up, especially if you have any small or invisible cuts and abrasions that make it even easier for the virus to penetrate. You could also catch the virus from an infected towel.
Verrucae 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.
When you have verrucae on a non-weight-bearing surface (such as on the top of the foot or on the toes), they protrude above skin level, tend to be fleshier and cause less pain.
