Additionally, the appearance of skin lesions of a disease can evolve over time.
Despite the causes of the visual complexity, and no matter when a patient is evaluated on the timeline of the disease process, accurate identification of morphology and classifications of skin lesions are the keys to diagnosing a patient's skin condition.
This series of pictures demonstrates the evolution of lesions in a patient with zoster (shingles).
Day 1: Grouped umbilicated vesicles form within a dermatomal skin distribution
Day 5: Vesicles have crusted, and small erosions occur where crusts have "fallen off"
Day 6: More crusts forming and redness decreasing
Day 7: Crusts have resolved
Day 21: Hypopigmented macules, small scars, and no redness (inflammation)