Why does my head hurt after drinking alcohol?

Generally, headaches after drinking alcohol may be caused by alcohol intolerance, dehydration, alcohol allergy, migraines, hypertension, and other reasons. Symptomatic treatment through general therapy, medication, and other methods is needed. If discomfort occurs, it is recommended to seek timely medical advice and receive corresponding treatment under the guidance of a physician. A detailed analysis is as follows:

1. Alcohol Intolerance

Due to a lack of alcohol dehydrogenase in the liver, alcohol cannot be rapidly decomposed and metabolized, causing it to remain in the body for a longer period. Alcohol acts on the blood vessels of the brain, leading to vasodilation and resulting in headaches, which may be accompanied by symptoms such as facial flushing, palpitations, and rapid breathing. It is recommended to consume carbohydrates such as bread and steamed buns, as they absorb water and expand in the stomach, helping to delay alcohol absorption.

2. Dehydration

Alcohol acts as a diuretic, inhibiting the secretion of antidiuretic hormone and reducing the kidney's reabsorption of water, thereby increasing urine output and causing fluid loss in the body. Dehydration thickens the blood, lowers blood pressure, and reduces cerebral blood flow, which can trigger headaches, possibly accompanied by thirst, dark yellow urine, fatigue, and other symptoms. It is recommended to drink adequate water while consuming alcohol to replenish lost fluids.

3. Alcohol Allergy

An alcohol allergy reaction is usually due to the body's allergic response to ethanol or sulfites in alcoholic beverages, releasing inflammatory mediators such as histamine, leading to vasodilation and headaches. Symptoms may include facial flushing, rashes, nausea, and others. It is recommended to avoid consuming alcohol that causes allergic reactions. Antihistamines such as Loratadine tablets, Cetirizine hydrochloride tablets, or Promethazine hydrochloride tablets may be taken under a doctor's guidance to alleviate allergy symptoms.

4. Migraine

Migraines may be related to genetic factors, dietary factors, mental factors, and more. They are mainly characterized by unilateral or bilateral pulsating headaches, often occurring on one side of the head. Alcohol consumption may trigger migraine attacks, accompanied by symptoms such as vomiting, photophobia, and phonophobia. It is recommended to use medications such as Naproxen tablets, Ergotamine caffeine tablets, or Diclofenac sodium tablets under the guidance of a doctor.

5. Hypertension

Alcohol intake can temporarily elevate blood pressure. If one already has hypertension, this increase in blood pressure may cause headaches, accompanied by symptoms such as dizziness, palpitations, and chest tightness. It is recommended to use medications such as Nifedipine tablets, Methyldopa tablets, or Capoten sustained-release tablets under the guidance of a doctor for treatment.

In daily life, it is recommended to eat some easily digestible foods after drinking, such as millet porridge or soft noodles, which can protect the gastric mucosa, reduce alcohol irritation, and also provide energy.