Why do you get headaches after stop drinking alcohol many years?

Headaches are one of the most common symptoms of alcohol withdrawal. In fact, alcohol withdrawal is the most common cause of headaches (excluding tension-type headaches) that come on within 24 to 72 hours of stopping or reducing alcohol intake. In this type of headache, the pain usually goes away within a few days.

Alcohol-related headaches may happen for several reasons, including:

Chemical changes: Alcohol triggers changes in the brain's chemistry that can lead to a widening of blood vessels and increased blood flow to the brain, according to the National Headache Foundation. This can lead to headaches. It takes time for these brain chemicals to return to normal levels after drinking stops, so many people experience alcohol withdrawal headaches as their body adjusts.

Acetaldehyde: People who drink alcohol produce a substance in the liver called acetaldehyde. Acetaldehyde can irritate blood vessels in the brain, causing headaches. Higher levels of acetaldehyde can also lead to nausea and vomiting.

Dehydration: Heavy alcohol consumption can cause dehydration, leading to headaches.

Lack of sleep: Alcohol can disrupt sleep, and inadequate sleep can trigger headaches or worsen existing headaches.

Anxiety and stress: Heavy drinking can cause anxiety, which can trigger headaches. Stress is another common headache trigger, and reducing alcohol consumption can lead to increased levels of stress initially, which can increase the likelihood of headaches.

While headaches associated with alcohol withdrawal are more common within a few days of stopping drinking, they can happen many years later as well. These headaches can be triggered by a variety of factors, including:

Genetic factors: Some people may have a genetic predisposition to experiencing headaches after drinking.

Alcohol sensitivity: People who are more sensitive to the effects of alcohol may experience headaches after drinking, even if they drink only a small amount.

Other underlying health conditions: Medical conditions such as high blood pressure, diabetes, and sinus problems can contribute to headaches triggered by alcohol.