What should be checked before beginning a hair service with a client?

Checking the client’s medical history is crucial before beginning any hair service. This step allows the barber or stylist to be aware of any allergies, sensitivities, or medical conditions that could affect the service. For instance, some clients may have allergies to certain hair products, chemicals, or specific ingredients that could lead to adverse reactions during or after the service. Understanding this information helps ensure the safety and well-being of the client, enabling the barber to take necessary precautions or avoid certain products altogether.

While reviewing the salon's appointment schedule is important for organizational purposes and time management, it does not directly relate to the health and safety of the client. The type of products used is tied to the service but is secondary to ensuring that the products are safe for the client based on their medical history. Similarly, while a stylist’s experience is relevant to the quality of the service, it does not address any potential risks to the client. Thus, the client’s medical history is the most pertinent factor to evaluate before starting a hair service.