As with any procedure where topical ointments or anesthetics are used, risks may occur if the patient is allergic to certain ingredients, such as lidocaine. Most clients however, would know if there have been any previous reactions before, such as during routine dental work. Other risks may have to do with the technician’s level of expertise or experience. For example, a fanning or bleeding of color may occur if the technician does not know how to hold the machine or needle properly. A client consultation and medical history form is obtained first, to discuss any known allergies or questions ahead of time. It’s also a good time for the technician to explain the process in general, and to secure a signed release before performing any patch tests prior to the procedure. The most common complaints are aesthetic in nature. Be sure the client approves of the shape, thickness and color prior to starting. The second most common complaint is fading of the color, or color changes. Be sure to receive proper training on how to prevent this. Obtain recent certification.