A diagnostic decision tree is provided for each of the disease groups, including: Acneform Eruptions, Alopecia, Eczematous Rashes, Erythematous Rashes, Papules, Scaly Papules & Plaques, Vesicles & Bullae and White Macules. These decision trees help develop a careful and logical approach to diagnosis. Try clicking on "yes" or "no" in answer to the questions shown below until you reach a diagnosis and then "go to article".