What should you do if a client is allergic to a nail product you intend to use?

When a client has an allergy to a specific nail product, the best course of action is to avoid using that product altogether. This ensures the client's safety and prevents any adverse reactions, which can range from mild irritation to severe allergic responses.

Discussing alternative products with the client acknowledges their concern and allows for a collaborative approach to finding a solution that meets both their safety needs and their aesthetic desires. This option fosters trust and demonstrates a commitment to client wellbeing, which is crucial in the beauty industry.

The other options suggest methods that could potentially put the client at risk by either using the product or trying it in a limited way. Such approaches could lead to serious health repercussions, making them less responsible choices in a professional setting.