After drinking alcohol will stimulate the cerebral blood vessels spasm, resulting in insufficient blood supply to the brain, causing a headache due to lack of oxygen to the brain cells; there are no 6 general methods to relieve headache, commonly used methods to relieve headache after drinking are these 4: 1, drink water: after drunkenness will generally vomit, the body will be dehydrated at this time, you can drink more water, replenish water, can also relieve headache; 2, rest: through rest can also relieve headache after drinking. You can have a good sleep and wake up to reduce the symptoms; 3. cold compress: put ice in an ice bag or wrap it in a towel and put it on the headache area to make the local blood vessels cool and contract, and after the spasm is relieved, the headache symptoms will be reduced; 4. food: honey water can relieve headache, the fructose in honey has the effect of decomposing and absorbing alcohol; tomatoes contain fructic acid that can relieve the damage of alcohol on the stomach, and can also convert ethanol into lipids, which can be excreted from the body. Watermelon juice has a diuretic effect, which can discharge the alcohol in the body through urination and reduce headache symptoms; grapes contain tartaric acid, which can react chemically with ethanol, diluting the ethanol in the body and relieving headaches.