Risks include bleeding beneath the skin called a hematoma, infection, temporary hair loss at the incision sites, thickening of scars, asymmetry, risks of anesthesia, and/or nerve injury that leads to a weakness of some of the muscles of the face. Nerve injury is usually temporary and is the result of stretching of the nerves. Numbness of the skin is expected and can persist for several months. Minor revisions may be necessary to achieve your final goals.