The monkey on the hand, medically known as common warts, common warts is caused by human papilloma virus infection and caused by the disease, usually through the direct way of infection and indirect way of infection, direct infection is direct contact with the patient’s warts. Indirectly, it is possible to get in touch with the patient’s used items and get infected. After getting in touch with the human papilloma virus, the virus can enter the cells through the tiny wounds of the skin and mucous membranes, and constantly reproduce, proliferate, and gradually manifest in the skin of the hand as warts. If not treated, common warts will become more and more, it is recommended to use carbon dioxide laser treatment, or the use of cryotherapy.