What should a practitioner do if a client's skin shows signs of irritation post-treatment?

When a client exhibits signs of irritation after a treatment, it is essential for the practitioner to take immediate and appropriate action to alleviate discomfort and promote healing. Applying soothing agents is a vital step in providing relief to the irritated area, as these products can help calm the skin and reduce inflammation.

Instructing the client on proper aftercare is equally important. Clients need to understand what to do following a treatment to minimize the risk of further irritation and to support the skin's recovery process. This may include avoiding sun exposure, using gentle cleansers, or steering clear of certain products that may aggravate the skin.

The other options are less appropriate. Advising clients to apply more products could exacerbate the irritation, while instructing them to return for another treatment before the skin has healed could cause further damage or discomfort. Monitoring the skin until all effects have subsided, while somewhat reasonable, lacks proactive care and does not provide immediate relief to the client. Therefore, applying soothing agents and giving proper aftercare instructions is the best course of action to ensure client comfort and skin health.