Common warts are contagious. Warts are benign skin conditions caused by human papillomavirus infection, and they are contagious. Mainly through direct contact or indirect contact spread, human papilloma virus will be through the skin mucous membrane tiny breaks into the epithelial cells, and replication and proliferation of local epithelial cells abnormal proliferation and differentiation, thus causing the skin of the benign redundancy. The actual skin can be directly in contact with the patient’s warts, or indirectly in contact with the patient’s contaminated household goods, can cause the virus to be infected. The actual wart is a very important part of the process, and it’s a very important part of the process.