How alcohol affects your body (2023)

How alcohol affects your body

Many Australians enjoy a drink. In fact, alcohol is Australia’s most widely used social drug. Like all drugs, alcohol can damage your body, especially if you drink heavily every day or in binges. Even small amounts of alcohol are still linked to the development of certain diseases, including numerous cancers.

Alcohol affects your body in many ways. Some effects are immediate and last only a while; others accumulate over time and may significantly affect your physical and mental health and quality of life.

How much harm alcohol causes your body depends on how much you drink, your pattern of drinking, and even the quality of the alcohol you drink. Your body size and composition, age, drinking experience, genetics, nutritional status, metabolism, and social factors all play a part as well.

The short-term effects of alcohol

The short-term effects of a single occasion of drinking too much alcohol can include:

  • lowered inhibitions
  • interpersonal conflict
  • falls and accidents
  • altered behaviour – including risky or violent behaviour
  • hangover
  • alcohol poisoning.

The severity of the short-term effects of alcohol typically depends on how much a person drinks, but other factors such as hydration and food consumption also play a role.


You’ve probably heard of, or perhaps experienced, a ‘hangover’ – a set of unpleasant symptoms that usually follows excessive alcohol intake. Most people can recognise the signs and treat the symptoms themselves.

Generally, the more you drink the higher the likelihood you’ll experience a hangover, but there’s no way to predict how much you may be able to drink and avoid a hangover. Some people can experience a hangover from one drink.

The severity of a hangover often has to do with how your body metabolises alcohol, as when you drink, alcohol triggers a number of reactions in your body. These reactions can contribute to hangover. They include:

  • frequent urination and dehydration
  • an inflammatory response from your immune system
  • irritation of the stomach lining
  • a drop in blood sugar
  • an expansion of blood vessels.

Depending on what you drank and how much, your hangover may include these symptoms:

  • thirst
  • headache
  • muscle aches
  • diarrhoea
  • nausea
  • fatigue
  • weakness
  • trembling or shaking
  • rapid heart rate
  • increased blood pressure
  • dry mouth and eyes
  • poor concentration
  • increased sensitivity to light and sound
  • a feeling that the room is spinning, or a sense of dizziness
  • anxiety, depression, irritability and other mood disturbances
  • poor, restless or less sleep.

Most hangovers typically start once your blood alcohol level starts to return closer to zero. Hangovers generally only last up to 24 hours, and go away on their own.

Hangovers are more likely or may be more severe if you:

  • drink on an empty stomach (so it’s a good idea to eat before and while you drink alcohol)
  • use other drugs while drinking (smoking nicotine is known to make a hangover worse)
  • sleep poorly after drinking (alcohol may worsen your sleep which may in turn worsen your hangover)
  • drink dark coloured alcohols, such as brandy, rum or whiskey.

Pacing yourself (aiming to drink one drink or less every hour), and drinking water between alcoholic drinks may reduce the severity of a hangover.

Hangovers usually pass with time, but these tips may help to ease symptoms:

  • Sip water or fruit juice to stay hydrated.
  • Eat something. Plain or bland foods, such as soup or toast, may be easier on a fragile stomach.
  • Take a pain reliever. (A standard dose of an over-the-counter pain reliever such as paracetamol may ease your headache, but aspirin can irritate your stomach.)
  • Sleep it off.

If you are regularly experiencing hangovers, or hangovers are affecting your relationships, work or life in general, talk to your doctor about potentially cutting back your drinking.

Alcohol poisoning emergency

Sometimes heavy drinking results in the much more serious effect of alcohol poisoning. This is a life-threatening emergency. Call 000 for emergency care if you see these signs in someone who has been drinking:

  • confusion
  • vomiting
  • seizures
  • slow breathing (less than eight breaths a minute) or irregular breathing (a gap of more than 10 seconds between breaths)
  • blue-tinged skin or pale skin
  • low body temperature (hypothermia)
  • difficulty remaining conscious
  • passing out (unconsciousness) and can't be woken.

If someone is unconscious or cannot be woken up, they could be at risk of dying. If you suspect someone has alcohol poisoning – even if you don't see the signs and symptoms – seek immediate medical attention.

The long-term effects of alcohol

Historically it has been believed that consuming on average more than two standard drinks a day is what can cause many long-term health problems and other harms. Nowadays, current research states that any level of alcohol consumption can pose an increased risk of chronic disease development.

The World Health Organization (WHO) says alcohol contributes to more than 200 different types of diseases and injury.

Some of the most common alcohol-related harms include:

  • road and other accidents
  • domestic and public violence
  • crime
  • family breakdown
  • social dysfunction
  • cardiovascular disease
  • cancers, including of the oral cavity, pharynx, larynx, oesophagus, liver, colorectum and female breast
  • diabetes
  • nutrition-related conditions, such as folate deficiency and malnutrition
  • overweight and obesity
  • risks to unborn babies
  • liver diseases
  • mental health conditions, such as anxiety and depression, and interference with antidepressant medication
  • alcohol tolerance and alcohol dependence or addiction
  • long-term cognitive impairment
  • self-harm (suicide).

The WHO reports that in 2016, 5.3 per cent of all deaths globally were caused by alcohol consumption. Worldwide, more men die as a result of alcohol consumption than women.

In the long term, alcohol consumption can affect all aspects of a person’s life: their physical and mental health, work, finances and relationships.

What is binge drinking and how does it affect your body?

Generally, binge drinking means drinking heavily over a short period of time with the intention and result of getting immediately and severely intoxicated (drunk).

In the short term, binge drinking may result in a hangover, alcohol poisoning, or any of the other short-term effects of alcohol consumption, such as accidents and violence, discussed above.

In the long term, binge drinking may result in any of the long-term effects of alcohol consumption, such as heart disease, cancer, liver cirrhosis and diabetes.

How to avoid or reduce the effects of alcohol on your body

The best way to avoid the effects of alcohol on your body is to not drink alcohol. This is especially important if you are trying to get pregnant, or you are pregnant or breastfeeding, as there is no safe level of alcohol use that has been identified.

If you choose to drink alcohol, low level drinking is better for your body than heavy drinking or binge drinking.

Australia’s national guidelines to reduce health risks from drinking alcohol from the National Health and Medical Research Council say that the lifetime risk of harm from drinking alcohol increases the more you drink. For healthy men and women, they advise:

  • Drinking no more than 10 standard drinks per week reduces the lifetime risk of harm from alcohol-related disease or injury.
  • Drinking no more than four standard drinks on any one day reduces the risk of alcohol-related injury arising from that occasion.
  • The less you choose to drink, the lower your risk of alcohol-related harm. For some people not drinking at all is the safest option.

See the guidelines for more advice on levels of drinking, or read this fact sheet from the Alcohol and Drug Foundation.

It is important to monitor your alcohol consumption as part of a healthy diet. Alcohol consumption has the potential to cause weight gain and obesity, depending on how much someone drinks, the type of drink consumed, as well as the makeup of each individual and a number of other interpersonal factors. You may like to read some more about alcohol consumption and risks.

Where to get help

  • Your GP (doctor)
  • Drug Info Tel. 1300 85 85 84 – information and referral services for anyone seeking help for alcohol or drug use
  • Self Help Addiction Resource Centre (SHARC) Tel. 1300 660 068
  • Family Drug Support Tel. 1300 368 186 (24 hours a day, seven days per week)
  • Alcohol and other drug treatment services
  • DirectLine Tel. 1800 888 236 (24 hours a day, seven days per week)
  • Your local community health service
  • An alcohol or other drug helpline in your state or territory, Tel. 1800 250 015 (national support line, 24/7).


How alcohol affects your body? ›

High levels of alcohol in your body can result in headaches, severe dehydration, nausea, vomiting, diarrhea, and indigestion. Drinking excessively, even on a single occasion, increases a person's risk of detrimental heart effects.

What happens to your body when you drink alcohol? ›

When you drink alcohol, you don't digest alcohol. It passes quickly into your bloodstream and travels to every part of your body. Alcohol affects your brain first, then your kidneys, lungs and liver. The effect on your body depends on your age, gender, weight and the type of alcohol.

How long does alcohol affect the body? ›

It can take from 2 to 3 hours for the body to metabolize alcohol from one to two drinks, and up to 24 hours to process the alcohol from eight to ten drinks. A hangover can last up to 24 hours. Doctors advise not drinking again within 48 hours of a heavy drinking session, to allow the body to recover.

What are the 4 types of drinker? ›

Generally, people drink to either increase positive emotions or decrease negative ones. This results in all drinking motives falling into one of four categories: enhancement (because it's exciting), coping (to forget about my worries), social (to celebrate), and conformity (to fit in).

What are signs of drinking too much? ›

Symptoms of alcohol overdose include mental confusion, difficulty remaining conscious, vomiting, seizures, trouble breathing, slow heart rate, clammy skin, dulled responses (such as no gag reflex, which prevents choking), and extremely low body temperature. Alcohol overdose can lead to permanent brain damage or death.

What happens when you stop drinking everyday? ›

When you stop drinking, you have the opportunity to: Improve your mood, anxiety, and stress levels. Get better sleep and feel more rested. Focus on having better relationships with your friends and family.

What alcohol does to your looks? ›

Alcohol dehydrates your body, including the skin – and this happens every time you drink. When you drink, the dehydrating (or 'diuretic') effect of alcohol means your skin loses fluid and nutrients that are vital for healthy-looking skin. This can make your skin look wrinkled, dull and grey, or bloated and puffy.

What organ does alcohol affect the most? ›

Heavy drinking takes a toll on the liver, and can lead to a variety of problems and liver inflammations including: Steatosis, or fatty liver. Alcoholic hepatitis. Fibrosis.

How many drinks per week is considered an alcoholic? ›

Heavy Alcohol Use:

NIAAA defines heavy drinking as follows: For men, consuming more than 4 drinks on any day or more than 14 drinks per week. For women, consuming more than 3 drinks on any day or more than 7 drinks per week.

How long does it take to be normal after drinking? ›

The new research shows that it takes at least two weeks for the brain to start returning to normal, so this is the point at which the alcohol recovery timeline begins. Until the brain has recovered, it is less able to suppress the urge to drink. This is because the alcohol has impaired the brain's cognitive ability.

What are the 5 A's of alcoholism? ›

Clinical guidelines recommend addressing adolescent alcohol use in primary care; the 5 As (Ask, Advise, Assess, Assist, Arrange) may be a useful model for intervention.

Can you drink heavily and not be an alcoholic? ›

“This study shows that, contrary to popular opinion, most people who drink too much are not alcohol dependent or alcoholics,” said Robert Brewer, M.D., M.S.P.H., Alcohol Program Lead at CDC and one of the report's authors.

Do true feelings come out when drunk? ›

True feelings may come out when you're drunk, but this isn't necessarily true all the time.

How do you know if your liver is damaged by alcohol? ›

About alcohol-related liver disease
  • feeling sick.
  • weight loss.
  • loss of appetite.
  • yellowing of the eyes and skin (jaundice)
  • swelling in the ankles and tummy.
  • confusion or drowsiness.
  • vomiting blood or passing blood in your stools.
May 29, 2023

How many drinks a day is considered an alcoholic? ›

Heavy drinking includes binge drinking and has been defined for women as 4 or more drinks on any day or 8 or more per week, and for men as 5 or more drinks on any day or 15 or more per week.

What is the most common form of excessive drinking? ›

Binge drinking is the most common and costly pattern of excessive alcohol use in the United States. Binge drinking is defined as consuming 5 or more drinks on an occasion for men or 4 or more drinks on an occasion for women. Most people who binge drink are not dependent on alcohol.

What happens when you drink alcohol step by step? ›

When drinking alcohol, it's absorbed into the blood and reaches the brain. Your body starts to break down the alcohol immediately, starting in your mouth, then in your digestive system. As it enters your stomach and small intestine, some of the alcohol will be absorbed into your blood and circulated through your body.

What happens to your liver when you drink alcohol everyday? ›

Each time your liver filters alcohol, some of the liver cells die. The liver can develop new cells, but prolonged alcohol misuse (drinking too much) over many years can reduce its ability to regenerate. This can result in serious and permanent damage to your liver.

What are 3 social effects of alcohol? ›

Other social consequences of drinking too much can include:
  • financial problems due to excessive spending on alcohol.
  • limited career opportunities due to a conviction for an alcohol-related offence.
  • impacts on work performance.
  • losing friends because of the way you act when you're drunk.


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