Why one tends to suffer from headaches after consuming alcohol?

What's the physiology of these headaches?Why one tends to suffer from headaches after consuming alcohol?
Dehydration, alcohol causes it..Drink water before going to bed and that will help with the hangover headache..
It's caused by dehydration. If you drink a ton of water or juice before bed after drinking, your headache won't be as severe when you wake up.
It Constricts the Blood Vessels in Your Brain.
This is may be due to overdose, if not try to change the brand otherwise stop drinking..
Alcohol has a remarkable ability to get through defense number one: the liver. Once past the liver, alcohol is able to seep through the blood-brain barrier. Normally, most substances cannot do this. Psychotropic drugs can. Alcohol is one of them.
Headaches are usually the result of muscle tension in the head and neck, or, the swelling of blood vessels on the skull.
The simple answer here is that the brain doesn't like alcohol , and attempts to locate the exact process of veisalgia (hangover) have not yielded a complete understanding. The headaches due to alcohol consumption are likely due to dehydration.
Your body produces a hormone called ADH or anti diaretic hormone. So when you drink, this chemical is inhibited and water levels in your body are not maintained. Hence the reason you pee like a race horse when your drinking. When your fluid levels are not maintained blood vessels constrict. That is to say they become smaller so as they shrink and your blood pressure begins to increase as a result you feel pain, resulting from the increased pressure in this case exhibited as a headache.
Alcohol robs the brain of Glucose and your body of vitamins. Must eat as soon as possibile in the morning and while drinking to avoid this. This can be dangerous, most folks don't realize this.