Warts, commonly known as “wart”, are chronic benign diseases caused by infection with the human papillomavirus (HPV). The surface is rounded, polygonal papules, or fleshy, and may occasionally become malignant. Warts can be transmitted by direct contact or by auto-inoculation, and almost half of the population has “dealt with” them during their lifetime. However, many people do not realize that warts are caused by viruses and are therefore contagious. Warts caused by infection with different subtypes of viruses can take different shapes on the skin surface. There are four most common types of warts: plantar warts, common warts, flat warts, filiform warts, and condyloma acuminata. The surface is rounded, polygonal papules, and fleshy, and may occasionally become malignant. The actual molluscum contagiosum is an epidermal papule caused by a pox virus infection. The common skin warts: 1, metatarsal warts (HPV1, 4) is the occurrence of common warts in the plantar area, the damage occurs in the front of the plantar pressure parts of the initial pinhead large keratinous papules, gradually increasing, surface keratinization, rough uneven, around the high starting point more than the ring, if you use a knife to remove the surface keratin layer can be seen milky white keratinous soft pistil, painful to touch, the number is variable, single or multiple, sometimes more damage, and 2, common warts (HPV1, 2, 4, 7, 27, 29, 40, 54) commonly known as wart. The initial damage is a large pinhead flat elevated papule, gradually increasing to pea size or larger, round or round, the surface is dry and rough, keratinization is obvious, hard to touch, gray-yellow, gray-brown or yellow-brown, the top can be pistil or spiny, generally no conscious symptoms, most children and adolescents in the back of the hand or fingers and foot edge, etc., if the occurrence of the nail edge is known as periapical warts, common warts can also be a single soft fine The first thing you need to do is to get a good idea of what you are getting into. If you have a single cluster of uneven finger-like protrusions, the tip is gelatinous material, called finger-like warts, good for the scalp, can occur between the toes, face. 3, flat warts (HPV3, 10, 27, 28, 41) Most of them occur suddenly on the back of the face, hands and forearms, most of them are rice to soy large flat elevated papules, smooth surface, normal skin color or light brown, often most scattered or dense, due to scratching can be self-inoculated. They are arranged in beaded strips along the scratch marks and generally have no conscious symptoms. The process is chronic, can be self-receding before receding often appear inflammatory reaction, itching abnormal, after healing does not leave scars. 4, condyloma acuminata (HPV1, 2, 6, 11, 16, 18, 31, 33, 34, 35, 39, 45, 51, 68, 70, 73) also known as genital warts, venereal warts. They occur on the external genitalia, anus, perineum, cervix and vagina, and also on the bladder, ureter, lips, nipples, umbilicus and armpits. The basic damage is a soft reddish-gray or pale brown redundant organism of varying size, singly or in clusters, with a lobed or spiny surface, moist, narrow or tipped base, or a non-tipped wart with a non-narrow base on the body of the penis. The skin lesions are arranged in different shapes such as dotted, linear, overlapping, papillomatous, coronary, cauliflower, and myxoid. Some of them are huge warts, accompanied by the destruction of the tissue beneath them, so they are called “warty carcinoma”, which is considered to be a total low-differentiation squamous carcinoma later on. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. The actual fact is that you can find a lot of people who are not able to get a good deal on this. 5, infectious molluscum contagiosum: (caused by infection with infectious molluscum contagiosum virus, a pox virus) Most commonly seen in children and young people, the incubation period of 2-3 weeks, the damage is rice to pea-sized hemispherical papule, the center is slightly concave, the surface has a wax-like luster, white or pearl color, in the top of the wart after the central pick can extrude white cheese-like material, both molluscum contagiosum.