What must a cosmetologist do before using products on clients?

A cosmetologist must conduct a patch test for allergies before using products on clients to ensure the safety and well-being of their clients. This practice helps identify any potential allergic reactions that could occur as a result of product application. By performing a patch test, a cosmetologist can apply a small amount of the product to a discreet area of the client’s skin, usually on the inside of the wrist or behind the ear, and monitor for any adverse reactions. This step is crucial, as it helps to prevent possible irritation, allergic reactions, or other unfavorable outcomes that could arise from using products that the client may be sensitive to.

This precaution demonstrates professionalism and allows for a more personalized experience tailored to the client's unique needs and sensitivities. It is an essential part of the safeguarding process in cosmetology practice, reinforcing the importance of client safety and trust.