Yes to both. Also, this might vary, but hunger used to hurt a lot to me. The thing that helped was going on a 5 day fast (prepared, with a doctor approbation) and especially going through the pain on the 2nd day, which hurt more than when I broke my ankle, probably the worst pain I remember.

Nowadays, being hungry doesn't hurt as much, so I can easily let myself go hungry,and I'm at a healthy BMI.

The chronic illness is obesity. GLP-1 drugs are being used to treat obesity.