A common cause of headaches due to hunger is a dip in blood sugar, explains WebMD. When a person does not eat properly, his blood sugars drop extremely low in reaction, notes Headache MD.
People who struggle with hypoglycemia are more likely to experience hunger headaches, shares Headache MD. To avoid hunger headaches, it is important to eat a diet high in protein and avoid too many carbohydrates as they can cause the body's glucose levels to rise drastically and then crash, resulting in a headache. Lean proteins take a longer time to absorb into the digestive system enabling a body to stave off hunger longer and work more optimally.