The different types of skin lesions play an essential role in the precise description of skin diseases. One distinguishes between primary and secondary lesions.
Primary Lesions
Primary lesions are skin lesions at the beginning of the dermatosis, without secondary changes. They have a greater diagnostic impact than secondary lesions.
Secondary lesions develop from primary lesions over time or by additional artifacts, like scratching. They have less diagnostic impact and often do not allow conclusions to the primary lesions, since various primary lesions may evolve to the same secondary lesion, like for example scaling.
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