The warts on the hand may be due to the increase in the number of lesions, friction and collision caused by the local skin should be avoided, as soon as possible to seek medical treatment. 1.the hand long warts are mostly common warts, mostly due to the infection of low-risk types of human papillomavirus, such as 1, 2 subtypes lead to, the initial manifestation of the pinpoint large pimples, along with the development of the disease lesions expanding fusion, can be a papilloma-like proliferation. 2. The skin lesions of common warts are more brittle than normal skin, and the capillaries rupture during collision or friction, making it easy for bleeding to occur. In daily life, you should avoid local skin irritation to prevent bleeding infection and wart proliferation. Warts are contagious and can be passed on to others through skin contact or self-inoculation such as scratching. It is recommended that the hand warts after the appearance of warts timely medical treatment, follow the doctor’s prescription treatment.