Constant infections (3 months) and feeling lethargic and feverish after eating My husband has had a number of bacterial infections since December. Bloodtests indicated the infection and allergy tests indicated that he is allergic to environmental factors , e.g. grass, dust, etc. He is not allergic to any food. However whenever he eats he immediately becomes lethargic, sleepy, gets a fever and sometimes a slight tummy ache. He is on blood pressure tablets and cholesterol tablets. Since December, he has been on various antibiotics and feels better a few days after, but as soon as the medication is completed, the infection comes back. What could be the cause and what type of specialist should he go to?