What must be checked before treating nail conditions?

Before treating nail conditions, it is essential to check the client's history and allergies. Understanding a client's medical history, including any previous nail treatments or skin issues, as well as potential allergies to products, is critical for ensuring the safety and effectiveness of the treatment. This information can help to avoid adverse reactions and tailor the treatment to the client's specific needs.

Other factors, such as a client's favorite color, might be relevant when selecting nail polish or designs but do not impact the safety and efficacy of treating nail conditions. Similarly, the time of day or the general condition of the salon, while important for scheduling or hygiene protocols, are not directly related to the individual requirements or health considerations of the client based on their unique history and potential allergies.