 [ Symptoms ] why am i so tired and exhausted all of the time  energy levels are seriously non existent tired and exhausted feeling all the time gaining weight and can not seem to get it off no matter what or how little i eat [ Disease ] since we do not know anything about you your medical history nor is there a way of examining you over the internet and ordering some diagnostic lab tests it would be impossible to blindly determine the reasons for your fatigue you will need to see your medical provider to start the diagnostic work up