Does starvation usually cause severe headaches?

Eating a high-sugar meal can cause 'reactive hypoglycaemia', because the sudden rise in blood-glucose from the sugary food triggers an over-production of insulin, which ... Changes in caffeine intake, for example by drinking less tea or coffee, and changes in smoking frequency also often trigger headaches and migraines. read more

Possible causes of hunger headaches include muscle tension and low blood sugar. Hunger can cause your muscles to tighten, triggering a tension headache. Skipping meals, sleeping later than usual or delaying meals or snacks may result in a drop in your blood sugar levels. read more

The headache is a common malady, and there isn’t one who has gone and never encountered at least one in one form or another. Yet, while it is quite common, the more severe forms of headaches can come on quite suddenly and can actually last days. Hunger headaches are one of these types. read more

Starvation initially causes headaches, weakness, tiredness, cramps and dizziness. Denied glucose, the body enters a hypoglycemic state and confusion, irritability and increased heart-rate follow. As starvation continues, the person may experience nightmares, lack of coordination and fainting. read more