Final answer:
Infection or skin compromise is a contraindication for acupuncture since needle insertion can expose patients to pathogens if not performed under sterile conditions.
Step-by-step explanation:
The nurse should inform the client that infection or any skin compromise is a contraindication for the use of acupuncture. Acupuncture involves the insertion of needles into the skin, which can potentially facilitate exposure to pathogens if done in an unsterile manner or on skin that is already infected. Breaks in the skin, whether from the needles themselves or any pre-existing conditions, can act as entry points for bacteria and viruses. It is crucial for the instruments to be sterile and for the practitioner to follow the correct sanitization procedures to minimize the risk of infection.