Why does the back of the head hurt after drinking beer?

Generally, a headache at the back of the head after drinking beer may be caused by alcohol-induced dehydration, alcohol metabolites, migraines, cervical spondylosis, hypertension, or other factors. Symptomatic treatment such as general care or medication may be needed. If discomfort occurs, seek medical attention promptly. Detailed explanations are as follows:

1. Alcohol-induced Dehydration

Alcohol has a diuretic effect, inhibiting the release of antidiuretic hormone and causing the kidneys to excrete more water, leading to dehydration. Dehydration can affect normal brain function, causing headaches, and may also be accompanied by symptoms such as thirst, dark urine, and fatigue. It is recommended to drink more water during and after alcohol consumption to replenish lost fluids.

2. Alcohol Metabolites

Alcohol is metabolized in the body into acetaldehyde, a compound with strong irritant properties that can dilate blood vessels and trigger inflammatory responses, leading to headaches. It may also cause symptoms such as nausea, vomiting, and stomach discomfort. It is recommended to eat protein-rich foods like meat or dairy products before drinking, which may help slow alcohol absorption.

3. Migraines

Amine substances in beer may stimulate the sympathetic nervous system, inducing or worsening migraine symptoms. Migraine is a chronic neurovascular disease characterized by recurrent, pulsating headaches on one or both sides of the head, possibly accompanied by nausea, sensitivity to light, and sensitivity to sound. It is recommended to follow medical advice and use medications such as ibuprofen tablets, indomethacin tablets, or nimodipine tablets to relieve symptoms.

4. Cervical Spondylosis

Long-term strain or degeneration of the cervical spine may lead to cervical spondylosis, which can compress nerves or blood vessels, causing pain at the back of the head. After drinking, due to alcohol's anesthetic effect, patients may experience muscle relaxation or poor posture, worsening cervical spine issues and causing pain. Symptoms may also include neck stiffness, limited mobility, and numbness in the upper limbs. It is recommended to take medications such as chlorzoxazone tablets, eperisone hydrochloride tablets, or sodium naproxen tablets under medical guidance.

5. Hypertension

Hypertension is mainly caused by genetic factors, unhealthy lifestyle habits, and diseases. In patients with hypertension, alcohol consumption may cause blood pressure to rise or fluctuate due to alcohol's stimulating effects, affecting cerebral blood supply and causing pain at the back of the head. Symptoms may also include dizziness, palpitations, and chest tightness. It is recommended to take antihypertensive medications such as bisoprolol fumarate capsules, metoprolol succinate extended-release tablets, or metoprolol tartrate tablets under medical guidance.

It is recommended to replenish fluids quickly after drinking alcohol, such as drinking plenty of plain water or light tea, to accelerate alcohol metabolism and excretion, which may help alleviate headache symptoms.