What is a critical step before beginning a laser treatment?

Conducting a patch test is essential before beginning a laser treatment because it helps determine how a patient's skin will react to the laser. This preliminary test allows the practitioner to assess for any adverse reactions or sensitivities that may not be evident from just assessing the patient's skin type or condition. By testing a small area, the practitioner can ensure the safety and efficacy of the treatment, tailoring it to the individual's needs.

In contrast, scheduling recurring appointments should only be done after the initial treatment has been assessed for effectiveness and safety. Discounting patient history is not advisable, as understanding a patient's medical background is crucial in making informed decisions for laser treatment. Lastly, it is critical to communicate that all treatments can have potential side effects; stating there are no side effects may mislead patients and compromise safety and trust in the treatment process.