7 Reasons You Might Be Waking Up With A Headache
“After a night out your blood alcohol content drops back to normal or close to it, and you can start to feel symptoms that can include a headache,” Melanie King, pharmacist at Pharmacy2U tells HuffPost UK. “Alcohol can also cause your blood vessels to expand, which can again lead to a headache.”
Article source: https://www.huffingtonpost.co.uk/entry/all-the-reasons-you-might-be-waking-up-with-a-headache_uk_62c56815e4b0359fa4752790