If you have suddenly gained weight from stress or specific personal issues see a shrink. Likewise check if it could be a medical cause.
If it has happened gradually then the cure is probably all about regularly taking a step back and watching yourself.
Habit can be your best friend or your worst enemy. You have let yourself slip into the habit of continuously eating and are now convinced your body needs it.
Just like a drug, wean yourself off it slowly until your willpower to follow the habit of eating sensibly and only when you are actually hungry becomes stronger than the energy you have put into the "I am gonna eat anything anytime" habit.
