Acrodermatitis enterohepatica
Autosomal recessive, impaired zinc absorption, oral and perinatal rash + chronic diarrhoea
Erythema marginatum
Rheumatic fever
Erythema migrans
Lyme disease
Dermatitis herpetiformis
Coeliac disease
Herald patch
Pitiryasis rosea - Single scaly patch that appears before generalised viral rash in the shape of a drooping pine tree, self resolves after 6-10 weeks
Chronic itchy white genital rash
Lichen sclerosis
Pitiryasis versicolour
Aka tinea versicolour = patchy fungal infection of skin
Firm hard patch of skin, erythematous border, pale centre
Morphea - localised scleroderma