Why do i suddenly eat mindlessly ? Any help ?

i follow my diet the whole day and then suddenly i lose control and eat mindlessly all the food around without even tasting it or being hungry although i know im ruining my die. Its like i cant control myself then i regret it later and throw out. Do u know why this happens , why i lose control suddenly after a whole day and eat everything i wanted to eat before without tasting it ? Any help ? I really to lose weight thx :D