I get headaches when I drink. What's the reason?

Alcohol enters the human body and stimulates blood vessels in the brain, causing vasospasm and dilation, which in turn can lead to insufficient blood supply to the brain, so headache symptoms will occur. In addition, if accompanied by throat edema, chest tightness, shortness of breath, difficulty breathing and other manifestations, it is likely to be caused by alcohol poisoning, need to be sent to the hospital in time for emergency treatment.