This may seem strange, but does anyone else have this type of experience?

I have body image issues/eating disorders. Where I work we have to wear a photo badge each day. Some days when I'm talking to someone, I notice their gaze changes. Instead of giving me eye contact their focus is going from looking at my photo badge to my face and facial features---like they're studying or comparing for several seconds whether I look thinner or maybe fuller in the face. I get totally anxious and paranoid after that happens. Why are people so cruel ?