Are you on an anti-psychotic medication? Seroquel made me want to eat the furniture. I gained 70 kg and haven't lost it, despite coming off Seroquel.

Aside from medication as the cause, for me it is compounded by my poor eating habits. I eat large amounts. I have to feel full. It's an emotional need, not a physical one. I have worked out where it may have come from on a surface level in therapy, but I'm no closer to having lasting control over my eating habits.

I hope you find a solution that works for you. Habit change is hard.