It's good for them to know just in case it does get really bad, then they can bring it up in a good way.

I have been fairly well from the anorexia I was dealing with 11 years ago, & was staying at a healthy weight. Have gained a little more than I want & commented about wanting to lose a little to my psychologist. She asked me if it was me talking or my anorexia returning. It's me but once I start losing anorexia is easy to take over so glad she knows & can keep me on track.