What is an essential precaution before using wax on a client?

An essential precaution before using wax on a client is checking for allergies. Conducting an allergy test is crucial because it helps to identify any potential allergic reactions the client may have to the wax ingredients. Some people may have sensitivities or allergies to certain substances commonly found in waxing products, such as resins, fragrances, or preservatives.

By performing a patch test or simply discussing the client's past experiences with waxing products, practitioners can prevent adverse reactions that can lead to uncomfortable side effects, such as redness, swelling, or even more severe allergic responses. Ensuring client safety and comfort is a priority in waxing practices, making this precaution vital to the process.