When a child is dealing with obesity, it’s imperative that parents understand the emotional and physical challenges he faces regularly. “Speaking from experience, there are few things more painful than being an obese child or teen,” said Dee McCaffrey, organic chemist and author of “The Science of Skinny,” of Tempe, Arizona. “The feelings of unworthiness, isolation and low-self esteem weigh just as heavily on their hearts and minds as the excess pounds on their body.”