How to tell you're hungry?

I'm a diabetic so I can base my hunger on my blood sugar levels. Another way is wait 20 minutes after you eat. If you still feel hungry, then eat something else or have maybe half a portion of what you just did. It's possible to be hungry again after that hour you mentioned.

I used to get like that after eating food that had wheat flour in it. My stomach used to bloat and make all sorts of gurgles and rumbles. Maybe look at what you have eaten to see if it only happens after certain types of foods?

If you are eating the right amount of calories, it coul be either your blood sugar is too low or you have a stomach issue like an ulcer. Both of these will drive hunger pains despite having just eaten. It could also stem from the types of foods you are eating. More protein and complex carbs will help ease those hunger pangs.

Wait half an hour and drink a glass or two of water. If you are still hungry then eat, if you are not you were thirsty.

I know I'm hungry when I start to pass out and remember I've forgotten to eat all day

Much more preferable to the face stuffing I did years ago where I basically thought I was hungry if I didn't have food in my mouth

Might it be digestion noises?

In any case, hunger is just another feeling. Providing you're hitting your (presumably, healthy) calorie goals, try ignoring the feeling.

Also consider eating foods that take longer to digest.

Try having a few sips of water instead of eating - after about 20 or so mins the 'hunger' should go away.

One thing I heard that I like a lot is "If you can't tell whether or not you're hungry, chances are you're not."

However, I do like the idea of fasting for a day to know what hunger feels like and start again from there. That's a neat idea.

I rarely eat big meals, unless I need to satisfy my macros then it's usually a crap ton of protein. I find that big meals make me feel hungry and I want to snack, water usually helps this. I find that when I'm actually hungry I feel shaky, mean, anxious, and I can't think about what I'm eating I just have to get it in the pie hole . . . and that I can slow myself down when eating. I rarely actually get hungry and I try not to get over full because I don't like either of these feelings.

Hunger and thirst are caused by the same chemical process in your brain. So often, when you "feel" hungry, you are actually thirsty.

Your stomach making noise largely means it's just empty. And empty stomach does not mean that you are hungry. It means that food is no longer being processed in your stomach. But this is likely long after you've had your last meal.

Stomach rumbling post-eating is likely caused simply by the process of digesting the food you just ate, but if it's excessive you should look into eliminating troublesome foods from your diet. (For many people this is gluten and dairy, but it could be something else entirely.) For me, high-gluten foods cause me unpleasant digestion, so I've eliminated them (it's not as hard as it sounds).