It has been observed that many individuals undergoing plastic surgery tend to suffer from an obsession with their look. This can cause an addiction and may impel them to undergo plastic surgery several times. A common psychological disorder in this regard is known as 'body dysmorphic disorder', where people develop such a distorted and weird perception about their body that they can't be satisfied with any look.
Read more at Buzzle: http://www.buzzle.com/articles/bad-effects-of-plastic-surgery.html