Herpes labialis of the lower lip. Note the blisters in a group marked by an arrow.
Herpes simplex is a viral infection caused by the herpes simplex virus. Infections are categorized based on the part of the body infected. Oral herpes 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.[1] Genital herpes, often simply known as herpes, 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. Herpes 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 herpes simplex include: herpetic whitlow when it involves the fingers,[2] herpes of the eye,[3]herpes infection of the brain,[4] and neonatal herpes when it affects a newborn, among others.[5]
In New York City, USA, cases of newborn herpes infection are reported frequently due to the ultra-orthodox Jewish society where mohels use to frequently do metzitzah b'peh on newborn boys of Jewish parents. This causes frequent debate and protests in the media.[6][7][8] Health officials urge parents to avoid risks surrounding metzitzah b'peh.[9] The NYC Department of Health and Mental Hygiene has issued a public notice, warning circumcision experts to use mouthwash before operating on the genitals of newborn babies.[10]