Muscle dysmorphia, considered a type of reverse anorexia, is an obsessive-compulsive disorder that causes someone to feel as though they are small and weak, even if the person is an avid body builder. It's a condition that's often overlooked, partly because people who suffer from it often look extraordinarily healthy.

"'People would tell girls at school with eating disorders that they should get help, but tell me I was disciplined and dedicated.' [Michael] Feldman said."

The most noticeable sign that someone has muscle dysmorphia is often his or her rigorous work-out schedule. Suffers are often isolated from friends and family because they spend so much time in the gym. Read more at Examiner.com.