What action should you take if you notice a client has a nail disease?

If you notice that a client has a nail disease, the appropriate action is to recommend the client to a doctor. This is because nail diseases can indicate underlying health issues and may require medical treatment that falls outside the scope of manicurist practice. As a manicurist, you are trained to provide beauty treatments, not to diagnose or treat medical conditions. Referring the client to a healthcare professional ensures that they receive the appropriate care for their condition.

Taking any action other than a referral, such as treating the problem yourself or working on the client as usual, could exacerbate the condition or lead to further complications. Ignoring the problem is also not advisable, as it could put the client's health at risk and compromise the sanitary conditions of your work environment. Thus, recommending a medical professional is the most responsible and ethical choice in this situation.