I have add hypoglyceimic like experiances on and off for years with sudden hunger, feeling weak and wobbly and irritable. I have found avoiding caffeine helpful and if it happened a couple of biscuits would sort it. More recently and since I was really ill a couple of months ago due to untreated hypothyroidism I have had these episodes of feeling like I have low sugar and a sort of hunger that makes me feel ill but no matter how much I eat it does not get better. I have been like it for hour now. I have eaten 2 bowls of cornflakes. a stir fry tea and half a packet of ginger nut biscuits but still feel this horrible hunger and weakness.