 [ Symptoms ] i am hungry all the time no matter what or how much i eat what could be causing this  i am not on a diet although i try to eat healthy foods lots of veggies and no snack foods i get plenty of sleep at night but i still feel tired all day my life is not highly stressful no matter how much i eat in a meal or how often i eat i am hungry constantly even immediately after eating [ Disease ] there is little evidence that they can cause anemia a blood disorder in which you do not have enough red blood cells to carry the oxygen required by your body a 2009 case study published in the canadian medical association journal discussed one possible case in a 60 year old man who had been bitten hundreds of times the authors were able to find only one other case in the medical literature and that was dated 1962