Explaining Alcohol Shakes: Why Tremors Happen in Withdrawal
If you’ve ever tried to stop drinking after a period of heavy use, you may have noticed your hands shaking. This is your body’s physical response to the sudden absence of alcohol, and one of the most common early alcohol withdrawal signs that your nervous system is reacting to the change. These tremors are often called alcohol shakes, and they are a visible sign that your brain is struggling to regain its balance after being held down by alcohol for so long. Understanding why alcohol shakes happen can help you recognise when withdrawal is becoming serious and why stopping drinking safely often requires professional support.
How alcohol changes your brain's chemistry
To understand withdrawal tremors, you need to know a little about how alcohol affects the brain in the first place. Alcohol works primarily on two chemical messenger systems that control how excited or calm your nervous system is.
The first is GABA, which is your brain’s main calming system. GABA slows things down, creating feelings of relaxation and sedation. The second is glutamate, which is your brain’s main activating system. Glutamate speeds things up, keeping you alert and responsive.
When you drink, alcohol enhances the effects of GABA and suppresses glutamate activity. This is why alcohol makes you feel relaxed and eventually drowsy. Your brain is being chemically quietened.
But the problem comes with regular, heavy drinking. Your brain actively resists this quietening, and little by little, it reduces its sensitivity to GABA and increases its sensitivity to glutamate. This is your brain trying to restore normal function despite the constant presence of alcohol. It is a process called neuroadaptation, and it is central to the GABA glutamate imbalance alcohol creates.
What happens when you stop drinking
While you’re still drinking, these adaptations don’t cause obvious problems because alcohol is still there, keeping the system artificially suppressed. But when you suddenly stop drinking or even just reduce your alcohol intake, everything changes.
The alcohol is gone, but the adaptations your brain made in response to alcohol remain. GABA signalling is now weakened because your brain has spent so long adjusting to alcohol’s presence. At the same time, glutamate signalling is heightened and no longer held in check. The result is a nervous system alcohol withdrawal state where your brain goes into overdrive.
This overdrive is what causes alcohol withdrawal symptoms. Your heart rate increases, your blood pressure rises, you sweat more than usual (alcohol sweats), and your muscles start to shake.
What alcohol shakes feel like and when they start
Hand tremors during alcohol withdrawal are one of the first symptoms people notice. They usually start as an irregular, visible shaking that gets worse when you hold out your hands or try to do something precise, like holding a cup or writing.
Early alcohol detox symptoms like shaking usually begin within six to twelve hours after your last drink, though the exact timing varies from person to person. For some people, tremors are mild and pretty manageable, but for others, they’re severe enough to interfere with everyday tasks.
Part of the problem with alcohol dependence tremors is that they temporarily improve if you drink again or take a sedative. This is what makes stopping so difficult for some people. Your body has learned that alcohol takes the discomfort away, so the urge to drink again can be incredibly strong.
The autonomic nervous system withdrawal response includes many other symptoms, not just tremors. You might also experience elevated blood pressure, excessive sweating, nausea, and a general feeling of agitation or restlessness. These symptoms usually peak around 24 to 72 hours after your last drink before gradually getting better. However, the timeline can vary significantly depending on how long and how heavily you’ve been drinking.
Why tremors can be a warning sign
Even mild shaking can be an early indicator that withdrawal is escalating. Severe alcohol withdrawal symptoms don’t always develop, but when they do, they tend to follow a pattern that begins with tremors and builds from there.
In a small percentage of people, withdrawal progresses to seizures, which typically occur within 12 to 48 hours of the last drink. In an even smaller percentage, withdrawal can develop into delirium tremens, a serious condition involving confusion, hallucinations, severe agitation, and dangerous problems with your heart and blood pressure. Delirium tremens usually appears two to four days into withdrawal and can be life-threatening without proper medical care.
Tremors are a sign that your body is under real stress, and while many people recover without further complications, there’s always a possibility that symptoms could get worse. This is why medically planned and observed detox is recommended for anyone with a history of heavy drinking, particularly if you’ve experienced withdrawal symptoms before.
Factors that make alcohol withdrawal worse
Several factors can influence how severe your symptoms become and whether tremors progress to more dangerous complications.
Long-term heavy drinking is the biggest risk factor. The longer and more heavily you’ve been drinking, the bigger your brain’s adaptations will be, and the more dramatic the rebound when you stop.
Previous alcohol withdrawal episodes are also a major factor. Each time you go through withdrawal, your nervous system becomes more sensitised. This is a phenomenon sometimes called kindling. It means subsequent withdrawals tend to be more severe than earlier ones, with symptoms appearing more quickly and intensifying more sharply.
Physical health also plays a big role. Dehydration and malnutrition, both common in heavy drinkers, can aggravate withdrawal symptoms and make recovery harder. Electrolyte imbalances, vitamin deficiencies, poor sleep, and general physical exhaustion all add additional stress to a nervous system that’s already struggling to cope.
Age is another factor, with older people generally facing higher risks during alcohol withdrawal.
How alcohol withdrawal is treated
If you’re experiencing tremors or other withdrawal symptoms, treatment focuses on keeping you safe while your brain chemistry gradually returns to normal. Benzodiazepines, which work on the same GABA system that alcohol affects, are the most commonly used medications for managing alcohol withdrawal. They help calm the overactive nervous system, reduce the risk of seizures, and ease symptoms like anxiety and tremors.
In a medical alcohol detox setting like Providence Projects, you will be assessed when you arrive to determine how severe your withdrawal is likely to be. Staff will check your vital signs, ask about your drinking history and any previous withdrawal experiences, and monitor you regularly throughout the process. If your symptoms are mild, you may need only light support and observation. If they’re more severe, medication doses can be increased to keep you comfortable and safe. Many people also receive thiamine and other vitamins to address deficiencies that are common in heavy drinkers and can cause their own complications if left untreated.
This approach is far safer than trying to manage alcohol withdrawal at home, where complications can develop without warning. For people with a history of severe withdrawal, seizures, or delirium tremens, inpatient care is strongly recommended.
How alcohol withdrawal is treated
If you’re experiencing alcohol shakes or other withdrawal symptoms, the most important thing to understand is that you don’t have to manage this alone. Alcohol withdrawal can be unpredictable, and symptoms that seem mild can become serious quickly.
If you’re worried about withdrawal symptoms and want to stop drinking safely, Providence Projects offers medical alcohol detox programmes designed to support you through this process. Get in touch today to find out how we can help you take the first step, and what comes after.
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(Click here to see works cited)
- Becker, Howard C. “Kindling in Alcohol Withdrawal.” Alcohol Health and Research World, vol. 22, no. 1, 1998, pp. 25–33.
- Becker, Howard C., and Patrick J. Mulholland. “Neurochemical Mechanisms of Alcohol Withdrawal.” Handbook of Clinical Neurology, vol. 125, 2014, pp. 133–156, https://doi.org/10.1016/B978-0-444-62619-6.00009-4.
- Rogawski, Michael A. “Update on the Neurobiology of Alcohol Withdrawal Seizures.” Epilepsy Currents, vol. 5, no. 6, 2005, pp. 225–30, https://doi.org/10.1111/j.1535-7511.2005.00071.x.
- Schuckit, Marc A. “Recognition and Management of Withdrawal Delirium (Delirium Tremens).” New England Journal of Medicine, vol. 371, no. 22, 2014, pp. 2109–213, https://doi.org/10.1056/NEJMra1407298.