Cystic acne? [20 characters]?

i had cystic pimples many years ago but i still remember then,i knew each spot personally,staying in, shy with boys,avoiding photos,i thought i would grow out or them, a doctor was very honest with me he said we don't have the time or know what causes them,its something you'll have to live with,then someone told me their were allergic to something they ate,i stopped eating this and my face cleared up