What condition must barbers check before starting a haircut?

Before starting a haircut, it is essential for barbers to check the client's scalp for any abrasions or infections. This step is critical for maintaining hygiene and ensuring the safety of both the client and the barber. If the scalp has any cuts, sores, or infectious conditions, proceeding with a haircut could aggravate the existing issues, leading to pain for the client or even the spread of infection.

Additionally, assessing the scalp helps barbers identify any special care requirements or contraindications that may be necessary. For instance, certain skin conditions might require modifications in cutting techniques or products used during the haircut. Addressing these concerns before beginning the service reflects a barber's duty of care and professionalism.

While assessing hair type, previous haircut history, and stylistic choices are all important for achieving the desired haircut result, they do not prioritize the health and safety considerations that come first in any client service, making the health of the scalp the more pressing issue to check initially.