This is another example of the blithering ineptitude of the psychological industry--gathering a mess of symptomatic pottage, labeling it with a pattern name, and calling it science. But it doesn't identify anything causal or remedial, provides no diagnosis, prognosis, or path of healing.
Furthermore it offers no distinction between acute upset, which anyone can go through briefly under the right duress, and chronic manifestation.
Why does naming something a disorder make it sound authoritarian and scientific? I think the boys who write the DSM suffer from auto-reciprocal cowcrap disorder, myself.