Red rashes and erythroderma
Red rashes and erythroderma is the longest chapter in this handbook, covering a huge number of very varied presentations and diseases with cross referral to other chapters. It commences with psoriasis and its variants and then covers most of the red viral exanthems (skin rashes) seen in children (e.g. measles), with succinct clinical descriptions and many images. It goes on to describe infestations (e.g. scabies) and skin infections from fungal causes (e.g. Tinea or ringworm); bacterial (e.g. tuberculosis and leprosy); or spirochaetal (e.g. syphilis and Lyme disease). There are also rare skin diseases described including dietary insufficiency, Kawasaki disease, and mycosis fungoides and systemic diseases such as juvenile idiopathic arthritis. Management of the rare condition erythroderma is described and can be caused by a number of factors including many skin diseases such as psoriasis; infections such as staphylococcal scalded skin syndrome and rarely in children, drugs. Finally, erythroderma, failure to thrive, and recurrent infections are briefly discussed.