Eating watermelon after drinking can play a certain role in relieving alcohol: First, because watermelon contains a large amount of glucose, which can be quickly absorbed by the digestive tract and decomposed into monosaccharides into the blood, which can rapidly increase the blood sugar concentration, when the blood sugar concentration increases, it can act on the renal tubules through the principle of osmotic diuresis, so that the kidneys can strengthen the rapid discharge and release of ethanol and acetaldehyde in alcohol, and therefore can play a role in relieving alcohol. Second, watermelon also has the effect of diuretic and diuretic, which can accelerate osmotic diuresis, so it will make alcohol quickly filtered from the glomerulus and discharged from the renal tubules. Third, watermelon also has a purgative and detoxifying effect, which can relieve the symptoms of dizziness, headache and head swelling caused by alcohol overdose. Therefore, eating watermelon after drinking can have the effect of detoxifying alcohol.