Liposuction is normally safe, as long as patients are carefully selected, the operating facility is properly equipped and the physician is adequately trained. Though rare, complications may occur. Risks increase if a greater number of areas are treated at the same time, or if large amounts of fat and fluid are removed, requiring longer operating times. Very rarely, the formation of fat clots or blood clots can migrate to the lungs and cause death. The scars from liposuction are small and strategically placed to be hidden from view. However, imperfections in the final appearance are not uncommon after lipoplasty. The skin surface may be irregular, asymmetric or even baggy, especially in the older patient. Numbness and pigmentation changes may occur. Sometimes, additional surgery may be recommended.