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Early signs of hepatic encephalopathy that families notice first | CION Cancer Clinics
Families usually notice it first: a parent with liver disease becomes irritable, sleeps all day, forgets things or seems stubborn. These can be early signs of hepatic encephalopathy, where a weak liver affects the brain. It is treatable and often reversible. This page explains what to look for, what to do this week, and which signs mean going to hospital today. At CION Cancer Clinics, our team supports patients and families through symptoms, follow-up and life during and after treatment.
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Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed October 2026, next review due October 2027
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On this page
- What do families notice first when the liver starts to affect the brain?
- Which small changes should make a family think of the liver?
- We think something has changed. What should we do now?
- What families say, and what the doctor may write
- Four things families tell us, and what is actually true
- What this page cannot tell you
- Common questions about early signs of encephalopathy
The short answer
What do families notice first when the liver starts to affect the brain?
Families usually notice small changes in behaviour long before anyone says the word confusion. A father who has cirrhosis or liver cancer becomes unusually irritable, sleeps through the afternoon, forgets what he was told an hour ago or argues over things he would normally let go. These changes can be early hepatic encephalopathy, which means the brain is being affected by a liver that is no longer clearing the blood properly.
Why it matters that you noticed
Hepatic encephalopathy is treatable, and in most people it is reversible. Once the cause is found and the right medicines are started, many people return to their usual selves. The person living with the illness rarely sees the change in themselves. The son, daughter or wife who sees them every day is usually the first and best witness.
Who this page is for
This page is for families of someone with cirrhosis, liver cancer, or cancer that has spread to the liver from somewhere else. A change in behaviour in a person with no liver disease has many other causes and needs a general doctor first. If you want the science behind it, read why the liver affects the brain.
You are not imagining it, and they are not being difficult on purpose.What families describe
Which small changes should make a family think of the liver?
None of these on its own proves anything. Two or three together, in someone with liver disease, are worth a phone call to the treating team.
Mood and temper
Families say the person has become stubborn, short-tempered or childish. Some become unusually quiet and flat. Relatives often blame stress or old age.
Sleep turned upside down
Dozing through the day and lying awake or restless at night is one of the earliest and most common changes. See our page on sleeping all day and awake all night.
Small slips in thinking
- Losing track of a conversation
- Mistakes counting money or change
- Forgetting a dose of a regular medicine
- Slower answers to simple questions
Changes in the body
- Handwriting becoming untidy or shaky
- A slight tremor or jerky hands
- A sweet, musty smell on the breath
- Constipation in the days before
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When this cannot wait until tomorrow
Go to hospital today if the person cannot be woken properly, does not know where they are or who you are, is talking nonsense, has a fever, is vomiting blood or passing black stools, or has new pain or a tight, swollen belly. These can mean bleeding, infection or a fast-moving episode, and each needs treatment in hospital the same day. Do not give sleeping tablets or calming medicines at home to settle them. Tell the emergency doctor they have liver disease and bring their medicine list. Read more on when confusion needs hospital admission.
What to do this week
We think something has changed. What should we do now?
Write down what you saw
Note when it started, what changed, and whether it is getting worse. A short list of real examples helps the doctor far more than "he is not himself".
Check the usual triggers
Ask about constipation, a new medicine, a missed dose of lactulose, poor eating or drinking, or a recent fever. These often start an episode.
Call the treating team, not a new specialist
Families often take the person to a psychiatrist or a neurologist first. Start with the oncologist or liver doctor who knows the history.
Let the doctor examine and test
Expect blood tests for infection, salts and sugar, a check of the hands and alertness, and a review of every tablet. Some people need a scan to rule out other causes.
Family words, doctor words
What families say, and what the doctor may write
- "He has gone mad" or "he is not himself"
- The doctor may write altered sensorium or hepatic encephalopathy. It means the brain is affected by the liver, and it is a medical problem with medical treatment.
- "She just wants to sleep"
- Drowsiness, or a reversed sleep pattern. It is often the earliest sign and is easy to dismiss as tiredness.
- "His hands shake when he holds a cup"
- The doctor may look for asterixis, a flapping movement of the hands when the arms are held out. It is one of the signs doctors check at the bedside.
- "He has become very stubborn"
- A personality change. In liver disease this is a symptom to report, not a character flaw to argue with.
- Ammonia
- A waste product that a healthy liver clears. It is one part of the story, and a blood level alone does not decide the diagnosis.
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Commonly believed
Four things families tell us, and what is actually true
"This is just old age, or the stress of the illness."
Age and worry can change a person. A new change in someone with liver disease should still be checked, because an encephalopathy episode is treatable and missing it lets it get worse.
"If he is confused, the cancer must have reached the brain."
Liver cancer rarely spreads to the brain. Confusion in liver disease is far more often the liver itself, an infection, a salt imbalance or a medicine. Only the doctor can tell which, so ask.
"We should stop giving him protein so his brain recovers."
This is old advice that has changed. Most people with cirrhosis need enough protein to keep their muscles, and cutting it can do harm. Read should protein be reduced and ask the team before changing the diet.
"Once it starts, it will only get worse."
Many episodes settle completely with treatment of the trigger and medicines such as lactulose. Some people do have repeat episodes, and the team plans for that with you.
Being straight with you
What this page cannot tell you
It cannot tell you whether the change you have seen is hepatic encephalopathy. Confusion in a person with liver cancer can also come from infection, low sugar, low salt in the blood, dehydration, strong painkillers, sleeping tablets, alcohol withdrawal, a stroke or, less often, spread of cancer. Our page on encephalopathy, dementia or depression explains how doctors tell these apart.
It cannot replace an examination
A doctor needs to see the person, test the blood and review every medicine. At CION, the medical oncologist and the supportive care team look at the whole picture. Hepatology care, scans and hospital admission are coordinated through accredited partner hospitals and liver specialists when they are needed.
Who this does not apply to
This page does not apply to a person with no known liver disease, or to sudden weakness of one side of the body, a drooping face or slurred speech. Those need emergency care for a possible stroke straight away. It also does not cover confusion in a child.
If you are unsure whether what you are seeing counts, call the helpline and describe it. Someone will tell you honestly how soon the person should be seen.Questions we are asked
Common questions about early signs of encephalopathy
Is hepatic encephalopathy reversible?
In most people, yes. When the trigger is found and treated, and medicines such as lactulose are used properly, the thinking and behaviour often return to normal. Some people with very advanced liver disease have repeat episodes, and the team will explain what to watch for and how to reduce them.
Why does he seem fine one day and confused the next?
Early encephalopathy comes and goes. A day of constipation, poor eating, a small infection or a new tablet can tip the balance. This up and down pattern is typical, and it is one reason families doubt what they saw. Keep notes of the bad days and share them.
Should we take him to a psychiatrist?
Start with the doctor treating the liver or the cancer. Behaviour changes in someone with liver disease are often a liver problem first. If the treating team finds the liver is not the cause, they will refer to the right specialist and share the history with them.
Can constipation really cause confusion?
Yes. When stools stay in the bowel longer, more waste is absorbed into the blood, and a weak liver cannot clear it. That is why doctors ask about bowel habits first, and why keeping the bowels moving is one of the simplest ways to prevent another episode.
Is it safe for him to drive or cook alone?
Not while he has any signs, even mild ones. Even changes that look small can slow reactions and judgement. Ask a family member to take over driving, the gas stove and money matters for now, and ask the doctor when it is safe to restart. Explain this as safety, not as punishment.
Does this mean the cancer is getting worse?
Not necessarily. Encephalopathy often reflects how well the liver is working, which can change for many reasons. The doctor may check the liver tests and sometimes repeat a scan. Ask directly what they think caused this episode and what it means for the treatment plan.
He refuses his medicine. What can we do?
Refusal is often part of the confusion itself, not stubbornness. Stay calm, offer the medicine again later, and avoid arguing. Tell the team, because there may be other ways to give it. If he cannot take anything by mouth or becomes drowsy, take him to hospital today.
Who can we call if we are not sure?
Call the CION helpline and describe what you are seeing. Someone will help you judge whether the person needs a clinic visit this week or a hospital today. If he cannot be woken, has a fever or is bleeding, do not wait for a call back. Go to hospital.
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Sources
- Liver UK (formerly British Liver Trust) — Hepatic encephalopathy (HE)
- Merck Manual Consumer Version — Hepatic Encephalopathy
- MedlinePlus — Loss of brain function - liver disease
- NIDDK — Symptoms & Causes of Cirrhosis - NIDDK
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Hepatic encephalopathy: why the liver affects the brainThe plain explanation behind the changes you are seeingWhat triggers an episodeThe common causes families can check for at homeWhen confusion needs hospital admissionThe signs that mean going to hospital todayCaring for someone who is confused and agitatedPractical help for the days at home
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Has someone at home started behaving differently?
Tell us what you have noticed and we will help you judge how soon they should be seen, and by whom. One helpline serves every CION centre.