Exanthems (reactive rashes) - DermNet What is an exanthem? Exanthem is the medical name given to a widespread rash that is usually accompanied by systemic symptoms such as fever, malaise and headache It is usually caused by an infectious condition such as a virus, and represents either a reaction to a toxin produced by the organism, damage to the skin by the organism, or an immune response
Viral skin infections. Specific viral exanthems - DermNet An exanthem is a widespread erythematous rash that is accompanied by systemic symptoms such as fever, headache and malaise Exanthems during childhood are usually associated with viral infection and represent either a reaction to a toxin produced by the organism, damage to the skin by the organism, or an immune response
Viral skin infections - DermNet Laterothoracic exanthem (asymmetric periflexural exanthem of childhood or APEC), cause uncertain but many viruses implicated in case reports COVID-19 (SARS-CoV-2) Haemorrhagic fevers caused by togavirus, bunyavirus, and arenavirus are potentially fatal, with bleeding into the skin
Morbilliform drug reaction (maculopapular drug eruption) What is morbilliform drug reaction? Morbilliform drug eruption is the most common form of drug eruption Many drugs can trigger this allergic reaction, but antibiotics are the most common group The eruption may resemble exanthems caused by viral and bacterial infections A morbilliform skin rash in an adult is usually due to a drug In a child, it is more likely to be viral in origin
Laterothoracic exanthem (APEC) - DermNet Laterothoracic exanthem, Asymmetric periflexural exanthem of childhood, Superimposed lateralised exanthem of childhood, Unilateral laterothoracic exanthem Authoritative facts from DermNet New Zealand
Measles (morbilli) - DermNet Measles exanthem How is measles diagnosed? Diagnosis of measles is based on the characteristic history and physical examination Because the disease is now so rarely seen in developed countries, any suspected cases require laboratory confirmation This is particularly useful in the following situations: Sporadic cases Atypical cases
Enteroviral infections - DermNet Boston exanthem disease is c aused by echovirus 16 After a short fever, pink macules and papules suddenly erupt on the face and trunk, and less commonly the extremities
Erythema multiforme - DermNet Erythema multiforme is an immune-mediated, typically self-limiting, mucocutaneous condition characterised by ‘target’ lesions as seen in the images below Treatment is often not needed as episodes are typically self-limiting with no ongoing complications