A hangover is an unpleasant set of physical ailments that often occur the morning after drinking alcohol. More alcohol usually leads to worse symptoms. Mayo Clinic explains that a hangover can last for over 24 hours. Typical symptoms include headache, performance difficulties, excessive tiredness, light and sound sensitivity, moodiness, dizziness and reddened eyes.
Dehydration
One major cause of hangover headache is dehydration. Virginia Tech explains that alcoholic beverages turn off the thirst mechanism but that the body continues to make urine, more than normal, in fact. Over a space of hours, these events can lead to dehydration and headache.
Expansion of Blood Vessels
Alcoholic beverages cause your blood vessels to expand. While this affects the entire body, it is often noticed most in the head. Headaches often occur because of the expansion or blood vessels.
Acetaldehyde Production
When the liver breaks down alcohol, a chemical called acetaldehyde is formed. This chemical is responsible for several of the symptoms of hangover, including headache.
Lowered Blood Sugar
Alcohol causes the blood sugar to fall. This is heightened if the drinker does not consume food during and after drinking. Low blood sugar, known as hypoglycemia, can cause a hunger headache.
Cogners
Dark-colored alcohols contain substances called cogners, which are created when the alcohol is fermented. Cogners cause headache and other hangover symptoms.
To Prevent Hangover
The only sure way to prevent hangover is to avoid consuming alcohol. People who choose to drink should do so in moderation. Consumption of water before and while drinking alcohol helps prevent hangover headache. It is also beneficial to eat lightly before, during and after drinking.
About this Author
Lucy Boyd is a registered nurse who graduated summa cum laude from the University of the State of New York – Regents College with a Bachelor of Science in Nursing degree in 2000. A professional writer since 2007, Boyd is the author of two medical books. Trade magazines such as “PI Magazine” call on her to create feature articles explaining psychiatric and medical issues.
