Viral infections of the skin

 Many types of viruses invade the skin, but health care is focused primarily on only three groups. Two of these groups are causing inconvenience family: warts and cold sores (fever blisters or herpes simplex) on the lip. The warts are caused by the papilloma-virus and herpes simplex virus causes sores, such as herpes zoster. The third group of viruses that infects the skin is part of the family of that certain virus. The most notorious of this virus is the smallpox virus, which only arouses historical interest, has been eliminated worldwide through the use of a vaccine. In any case, remains a chickenpox infection common in children. The Molluscum Contagiosum is also caused by a dangerous virus.
 
 Warts
 
 The warts are small skin tumors caused by any of the 60 types of human papillomavirus.
 
 Warts can appear at any age but are more common in children and less common in older people. While the warts of the skin is easily spread from one area to another body, generally does not spread easily from one person to another. However, genital warts are contagious yes.
 
 The vast majority of warts are harmless. The most frequent types do not become cancerous. Some rare and some other types that infect the cervix and penis are, in rare cases, cancer.
 
 The size and shape of the wart depends on the type of virus that cause and its location in the body. Some warts are painless, others cause pain by irritation of the nerves. Some warts grow in group (mosaic warts), while other formations appear as isolated and alone. Often warts disappear without treatment. However, some persist for many years and others disappear and appear again.
 
 Diagnosis
 
 When doctors discussed a tumor in the skin, they should try to differentiate whether it is a wart or some other type of tumor. Some formations that may seem warts are actually appendages, molas, corns, calluses or even skin cancers. Warts are classified according to their shape and their location.
 
 Almost everyone has warts vulgar (verrucae vulgaris). These are hard bumps that have a rough surface, are rounded or irregular, colored gray, yellow or brown, and usually have less than 1 centimeter in diameter. Very often, they appear in areas subject to frequent injuries, as the fingers, around the nails (periungual warts), knees, face and scalp. Can be disseminated, but never vulgar warts are cancerous.
 
 The plantar warts appear in the foot, where they usually are flattened by the pressure that occurs when walking and are surrounded by skin thickened. Can be extremely painful. Unlike the calluses and the calluses, plantar warts tend to cause bleeding in the form of small freckles pinpoint where the doctor or shaving cuts the surface with a scalpel.
 
 Warts filiform formations are long, narrow and small that often emerge in the eyelids, face, neck or lips.
 
 The flat warts, which are more common in children and young adults, usually appear in groups in the form of injuries smooth, yellow-brown, especially in the face.
 
 The virus that causes warts wet (venereal warts, condyloma acuminata) in the genitals is transmitted through sexual contact.
 
 Treatment
 
 The treatment of warts of skin depends on the location, type and severity, as well as time spent on the skin.
 
 In general, vulgar warts disappear without treatment in less than 2 years. Daily applications of plaster or a solution containing salicylic acid and lactic acid soften the infected skin, gently scrape it can to make the wart to disappear faster. The doctor can make a treatment with freezing the wart using liquid nitrogen, but it may have to repeat the process after 2 or 3 weeks to eliminate it entirely. The  treatment that uses an electric current or laser surgery can destroy the wart, but both procedures can leave scars. Regardless of the method used in the treatment, the wart recurs in about one third of the cases. The doctor can also treat the warts vulgar with chemicals such as trichloroacetic acid or cantharidin, which destroy the wart. However, new warts usually arise around the edges of previous ones.
 
 Plantar warts tend to macerate with salicylic acid used in more concentrated form of solution or plaster. This chemical process should be accompanied by cuts in the wart with a scalpel, or freezing the implementation of other acids on its surface. Doctors can use additional techniques, such as the injection of certain chemicals in the wart to destroy it. In any case, plantar warts are difficult to cure.
 
 The flat warts are often treated with agents as retinoic acid or salicylic acid, they do show that the wart with skin scaly.