Your face has more than 40 muscles and each plays a role in creating facial expression. Practitioners with minimal knowledge may perform Botox injections. An inexperienced provider will be less familiar with the anatomy of the face, leading to possible complications and poor results. In fact, less experienced providers may end up using more volume of Botox (costing you more) to achieve the same result, simply because their application is less precise. Make sure the person is an expert in facial anatomy and aesthetic procedures, such as a MD with special interest in dermatology/aesthetic medicine or board-certified dermatologist.