Final answer:
The professional action to take is to proceed with the service with the approval of the client's physician.
Step-by-step explanation:
The professional action to take when a client with rosacea requests a facial service is to proceed with the service but with the approval of the client's physician.
Rosacea is a chronic skin condition that causes redness and inflammation, and certain facial treatments may aggravate the symptoms or cause discomfort. By consulting with the client's physician, you can ensure that the treatment is safe and suitable for them.
It is important to consider the client's needs and condition while providing the service, and involving their physician helps in making informed decisions and avoiding any potential risks.