The prickly wart, clinically known as a common wart, contains black spines that are not very deep and usually invade the skin by about 1 to 2 millimeters. Common warts are caused by infection with the human papilloma virus. The typical symptom is the appearance of a growth on the skin with a papillary change. Small black dots can be seen in the middle of the common wart, which is caused by the dilation of capillaries under the skin. The small black dots are not deep as the virus does not break through the basal layer of the skin. If you have common warts, you can apply imiquimod cream, interferon gel and other medications locally to treat the warts. If necessary, you can remove the warts through cryotherapy, laser treatment, electrocautery treatment, etc. If the warts are large, you can also be treated by surgical excision. If you’ve got a wart, you’ll be able to get it removed by means of freezing, laser treatment, or electrocautery, or even surgical removal.