<unk>  is a viral infection caused by the<unk>  virus. Infections are categorized based on the part of the body infected. Oral<unk>  involves the face or mouth. It may result in small blisters in groups often called cold sores or fever blisters or may just cause a sore throat. Genital<unk> , often simply known as<unk> , may have minimal symptoms or form blisters that break open and result in small ulcers. These typically heal over two to four weeks. Tingling or shooting pains may occur before the blisters appear.<unk>  cycles between periods of active disease followed by periods without symptoms. The first episode is often more severe and may be associated with fever, muscle pains, swollen lymph nodes and headaches. Over time, episodes of active disease decrease in frequency and severity. Other disorders caused by<unk>  include:<unk> ic whitlow when it involves the fingers,<unk>  of the eye,<unk>  infection of the brain, and neonatal<unk>  when it affects a newborn, among others. There are two types of<unk>  virus, type 1 <unk> V-1) and type 2 <unk> V-2).<unk> V-1 more commonly causes infections around the mouth while<unk> V-2 more commonly causes genital infections. They are transmitted by direct contact with body fluids or lesions of an infected individual. Transmission may still occur when symptoms are not present. Genital<unk>  is classified as a sexually transmitted infection. It may be spread to an infant during childbirth. After infection, the viruses are transported along sensory nerves to the nerve cell bodies, where they reside lifelong. Causes of recurrence may include: decreased immune function, stress, and sunlight exposure. Oral and genital<unk>  is usually diagnosed based on the presenting symptoms. The diagnosis may be confirmed by viral culture or detecting<unk>  DNA in fluid from blisters. Testing the blood for antibodies against the virus can confirm a previous infection but will be negative in new infections. The most effective method of avoiding genital infections is by avoiding vaginal, oral, and anal sex. Condom use decreases the risk. Daily antiviral medication taken by someone who has the infection can also reduce spread. There is no available vaccine and once infected, there is no cure. Paracetamol (acetaminophen) and topical lidocaine may be used to help with the symptoms. Treatments with antiviral medication such as aciclovir or valaciclovir can lessen the severity of symptomatic episodes. Worldwide rates of either<unk> V-1 or<unk> V-2 are between 60% and 95% in adults.<unk> V-1 is usually acquired during childhood. Rates of both increase as people age. Rates of<unk> V-1 are between 70% and 80% in populations of low socioeconomic status and 40% to 60% in populations of improved socioeconomic status. An estimated 536 million people worldwide (16% of the population) were infected with<unk> V-2 as of 2003 with greater rates among women and those in the developing world. Most people with<unk> V-2 do not realize that they are infected. The name is from<unk> , which is related to the meaning "to creep", referring to spreading blisters. The name does not refer to latency.
Herpes simplex
Shingles
Lentigo simplex
Molluscum contagiosum
Herpes labialis
Herpes gladiatorum
Smallpox
Cowpox