Signs You're Too Skinny Eating Recovery Center's Ovidio Bermudez, MD, FAAP, FSAHM, FAED, CEDS, Medical Director of Child and Adolescent Services, recently contributed insights to MSN.com's "Fitbie" blog on the topic of healthy weight. Find an excerpt of the article below, or click here to read the article in its entirety. Reaching a weight-loss goal requires months—if not years—of dedication. And sometimes, when you reach that milestone, it can be hard to dial back into maintenance mode. If you’re not careful, you may encounter a new batch of health problems related to your weight. “Being too thin stresses the body in a unique way,” says Ilene Fishman, a licensed clinical social worker and co-founder of the National Eating Disorders Association. So how skinny is too skinny? It’s hard to explain—and even trickier to calculate. A normal weight, according to the U.S. Department of Health and Human Services, is when your body mass index (BMI) falls somewhere between 18.5 and 24.9, but no two bodies are exactly alike and index numbers alone are not a good way to gauge your health. Sadly, those nearing a painfully thin frame become less and less likely to acknowledge the problem. “Often patients say ‘I’m not that thin,’ that’s distortion, it’s not reality," says Fishman. And the same distortion can keep your scale dipping deeper in the wrong direction. Whether you believe you’re underweight or not (no offense to the naturally thin), these are signs you may not be getting enough nutrients in your body. You’re moody. Believe it or not, when your body is undernourished, you may feel energized and have an urge to move. “That’s the brain telling the body to start moving to go get food,” says Dr. Ovidio Bermudez, MD, Medical Director of Child and Adolescent Services at the Eating Recovery Center in Denver. And as your body begins to become anxious physically, you start to drag emotionally. “You become depressed, anxious, and fearful,” says Bermudez. Your joints look large. If you’ve lost too much weight, you could be purging your body’s “good” weight—your muscle. “Most people think that as we lose weight we lose fat mass, but the reality is that we tend to lose more lean body mass than fat mass,” says Bermudez. The result is joints and bones that look over-exaggerated because of the loss of muscle tissue around them. Your skin can also become dry and wrinkled because it is losing its protection against your bones. “People begin to take sort of a hollow look,” he says. Read more from Dr. Bermudez.