The main symptom of a wart, medically known as a common wart, is a firm papule with a rough surface to touch. 1. Common warts are benign skin growths caused by human papilloma virus infection. It can occur in all parts of the body, mostly on the hands, starting as a pinhead-sized firm pimple, gradually expanding to the size of a soybean, its surface is rough, gray-brown or normal skin color. 2. Warts are mainly physical therapy, such as laser treatment, liquid nitrogen freezing, electrocautery, etc., can destroy the warts, so that the warts off. If the symptoms of common warts, it is recommended to go to the hospital in time, clear diagnosis, under the guidance of the doctor standardized treatment.