Flesh head warts are harmful, mainly including affecting one’s own beauty, contagious, cancer risk and so on. 1. Warts are usually caused by viral infections, and if they appear on the neck, arms, arms, face and other parts of the body, they will show up as red papules the size of a grain of rice, and there will also be itching and pain, which will affect their own aesthetic appearance. 2. Warts are virus-induced diseases that are contagious and can spread through direct or indirect contact, and healthy people can be infected by sharing toiletries, towels, and other public goods with patients, so they should be well protected. 3. If the patient after the warts often with the hands constantly scratch warts, or the use of irritating chemicals and other stimulation of warts, and not targeted treatment, warts may be stimulated, rapid increase, with a certain risk of cancer. If you have been diagnosed with warts, it is advisable to have a standardized treatment as soon as possible in order to minimize the adverse effects of the disease.