Final answer:
Do not perform a requested nail service if nails present a disease or disorder, instead refer the client to a healthcare professional for treatment.
Step-by-step explanation:
When nails present a disease or disorder prior to a nail service, it is not suggested to perform the requested service. This is because it can potentially spread the disease or disorder to other clients or exacerbate the condition. It is important to prioritize the health and safety of both the client and the nail technician.
Instead, it is recommended to refer the client to a healthcare professional who can provide appropriate treatment for their specific condition. This ensures that the disease or disorder is managed properly before any nail service is performed.