I thought I had a psych disorder for years, because of my binge eating, and then I discovered my binge eating had a physiological cause. When I addressed the physiology, the binge eating disappeared.
For me the physiological factors are PMDD (killer pms) and quickly digested carbs. When I'm not on an appropriate birth control, I binge during PMS/TOM.
When I eat sugar and other high glycemic carbs, the binges also return.