Final answer:
A salon professional needs to be able to recognize primary and secondary lesions.
Step-by-step explanation:
The salon professional needs to be able to recognize primary and secondary lesions. Primary lesions are the initial skin abnormalities that develop due to various causes, such as injury or infection. Examples of primary lesions include pimples, blisters, and ulcers. Secondary lesions, on the other hand, result from changes that occur in primary lesions, such as infection, scratching, or healing. Examples of secondary lesions include scars, crusts, and scales.