Reactions to pigment are “Not” common. We do a patch test prior to any procedure. As with any procedure where topical ointments or anesthetics are used a allergic reaction may occur if the patient is allergic to certain ingredients; such as lidocaine, however most clients would know if there have been any previous reactions before. 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 aesthetics in nature. Make sure the client approves of the shape, thickness and color prior to starting procedure. Clients should always inform their doctor if they have or plan to get cosmetic tattoos. If Client has gotten laser treatment in the past, color can turn out dark or black color. Collagen and pigments do not mix well.