Warts are solid growths on the skin which are caused by viruses that dominate & affect the skin. They are small and non-cancerous but there are other warts that tend to grow big especially when they are obvious ones and can get too much exposure from the rays of the sun and there are constant bumps that could make them bleed and this is a warning sign for you if you have warts. Be aware that warts that can turn to brown in color and feel soft should be given immediate attention. This is one of the signs that they can be turned into a type of skin cancer known as Melanoma. You can either go to your dermatologist or you can learn some wart removal techniques which you can do by yourself right in your own home without using any kinds of medications or undergoing surgical treatments.