The headache that occurs after drinking alcohol and sleeping is considered to be due to the presence of a small amount of alcohol in the alcohol. 1. alcohol is a toxic substance to the human body and is metabolized slowly in the body. the headache is caused by the toxic effects of alcohol. 2. in addition, to determine whether blood pressure is elevated after drinking alcohol, patients can measure their blood pressure. If you have high blood pressure, you can take oral antihypertensive drugs such as nimodipine or luohuaxi for treatment. 3, it is recommended that patients drink more sugar water before drinking alcohol, which can promote the metabolism of alcohol in the liver, to avoid discomfort after drinking and the phenomenon of drunkenness.