Skip to main content

We use cookies to help us improve your experience and to provide services like web chat. We also use cookies to measure the effectiveness of public health campaigns and understand how people use the website.

To find out more about cookies and how we use them, please see our privacy policy.

Coronavirus: Stay at home

Health information and advice to stop the spread of coronavirus.

Hangovers and feeling down

Alcohol affects your body and brain. Hangovers affect different people in different ways.

The fear

Some people call the effects of alcohol the next day 'the fear'. This is when you feel you have done yourself some lasting damage after a night of drinking.

Common effects of alcohol on your body and brain:

  • Headache - from dehydration and pressure from the widening of your blood vessels.
  • Tiredness - alcohol interferes with your sleep patterns.
  • Sensitivity to light.
  • Acetaldehyde - produced when alcohol is broken down. This makes the nervous system extra sensitive.
  • Thirst - alcohol makes you lose fluid from your body - as much as 4 times as much fluid as you take in.
  • Trembling - due to low blood sugar.
  • Sickness - alcohol increases the amount of acid in your stomach.

Morning-after feelings

Feeling down or depressed

Alcohol affects the brain’s happiness chemicals like serotonin and dopamine.

This may make you feel good and happy while you are drinking. But when the effect has worn off, you can feel anxious, down or depressed.

Regret

While you are drunk your sense of right and wrong and your judgement may not work so well.

This can lead to regret. You may wish you could turn back the clock and avoid some of the consequences of our actions.

Guilt and shame

Alcohol reduces your inhibitions. When you are drunk, you may do things that you would never do when you are sober.

It can be hard to face up to or deal with the consequences of embarrassing behaviour when we sober up.

You may feel bad that you got drunk. You may have done something silly or spent too much money. You may have let someone down because of your drinking.

Relationship worries

You may be worried that something you did has harmed your relationship with a friend or loved one.

You may have said or done something you regret.

Feeling unable to function

It can take your body hours to get back to normal after heavy drinking.

Alcohol also affects your sleep, so even if you are not sick, you will probably be feeling very tired.

You may have to cancel plans or miss commitments.

You may feel annoyed that you wasted your day. Or you may find it hard to meet your other responsibilities.

page last reviewed: 08/11/2019
next review due: 08/11/2022

Alcohol service finder

Find alcohol support and treatment services in our area

HSE Drugs and Alcohol Helpline

Freephone 1800 459 459 for confidential information and support