Primary Sclerosing Cholangitis (PSC): Complete Guide to Symptoms, Causes, Diagnosis, and Treatment

5 days ago

12 min read

Updated: 2 days ago

Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: September 2026

TL;DR

Primary sclerosing cholangitis (PSC) is a rare, long-term liver disease in which inflammation scars and narrows the bile ducts — the tubes that carry bile from the liver to the small intestine. Bile then backs up into the liver, damaging liver cells and eventually risking liver failure. About half of people have no symptoms at diagnosis, and the disease is strongly linked to inflammatory bowel disease: 70% to 80% of people with PSC also have IBD, most often ulcerative colitis. There are no approved medicines that alter the course of PSC, so care focuses on symptom management and monitoring; liver transplant is the only cure for advanced disease, with survival over 90% at one year and about 80% at five years.

Quick Answer

Primary sclerosing cholangitis (PSC) is a rare, long-term disease of the liver caused by inflammation of the bile ducts — the tubes that carry bile from the liver to the small intestine, where bile helps break down fats. Scarring and narrowing of the ducts let bile back up into the liver, damaging liver cells. PSC is immune-mediated — the body's immune system attacks healthy tissue — and about 70% to 80% of people with PSC also have inflammatory bowel disease, most often ulcerative colitis. Key symptoms include extreme tiredness, itching, upper belly pain, fever from repeat bile duct infections, and jaundice, but about half of people have no symptoms when diagnosed. There are no approved medical therapies that change the disease's course; treatment manages symptoms and complications, and liver transplant is the only cure for advanced PSC.

What Is Primary Sclerosing Cholangitis?

Primary sclerosing cholangitis (PSC) is a rare, long-term disease of the liver caused by inflammation of tubes in the liver called bile ducts. Scarring and narrowing of the bile ducts lead to liver damage. Over time, the liver loses its ability to filter blood and support digestion.

Bile ducts carry bile from the liver to the small intestine. Bile helps break down fats. When the ducts become damaged, bile backs up into the liver, causing damage to liver cells — and this damage can lead to liver failure.

PSC is rare, affecting up to 1 in 10,000 people. It is often linked with inflammatory bowel disease (IBD), especially ulcerative colitis. People with PSC are at higher risk of liver failure and cancers of the bile ducts, gallbladder, and colon. Care focuses on monitoring liver health and managing symptoms. Procedures can temporarily open blocked ducts, but liver transplant is the only cure for advanced disease.

Researchers believe PSC is an immune-mediated condition in which the immune system attacks healthy tissues. Other bile duct conditions may look similar but are different:

Condition	How it differs from PSC
Secondary sclerosing cholangitis	Develops when another problem — infection, gallstones, surgery, or injury — damages the bile ducts; it may improve if the cause is treated
Pediatric PSC	Begins in children or teens and can be accompanied by autoimmune hepatitis
Ascending cholangitis	A sudden, dangerous infection of the bile ducts, usually caused by a gallstone blockage; requires emergency treatment
Primary biliary cholangitis	Mainly damages the smaller bile ducts inside the liver, occurs mostly in women, and often responds to medicines

Symptoms: Often Silent at the Start

About half of people with PSC do not have symptoms when they get a diagnosis. Symptoms appear at some point as damage to the liver worsens.

Symptoms may include extreme tiredness, itching, pain in the upper belly, and diarrhea. Fever can develop, related to repeat infections of the bile ducts. Jaundice — yellowing of the whites of the eyes or of the skin, depending on skin color — is another sign of the disease progressing.

Symptom	Notes
Extreme tiredness	Persistent fatigue regardless of rest
Itching	Can be severe and widespread
Upper belly pain	Pain in the upper abdomen
Diarrhea	Often tied to coexisting IBD
Fever	Related to repeat infections of the bile ducts
Jaundice	Yellowing of the whites of the eyes or skin

When to See a Doctor

Make an appointment with a health care professional if you have severe, persistent itching on much of your body with no obvious cause. Also, see your health professional if you feel extremely tired all the time, no matter how much rest you get.

It is particularly important to talk with a health professional about extreme tiredness if you have ulcerative colitis or Crohn's disease — the strongest link to PSC is having IBD.

Causes and Risk Factors

PSC is an immune-mediated condition — the body's immune system attacks its own tissues. Usually, inflammation is the body's reaction to disease or injury, and it helps the body heal. But long-term inflammation from an immune-mediated condition can damage tissues.

In PSC, it is not clear what triggers the inflammation of the bile ducts. Research shows that PSC likely develops from a combination of factors rather than being passed directly from parent to child, known as simple inheritance. Some people may have a genetic tendency that makes them more vulnerable. On top of this, problems with the immune system and changes in the gut, such as the gut microbiome or environmental exposures, seem to play an important role.

The connection with inflammatory bowel disease is strong. About 70% to 80% of people with PSC also have IBD, most often ulcerative colitis. PSC also can occur in people with Crohn's disease, though less commonly.

Risk factor	Detail
Age	Can occur at any age; most often diagnosed in middle-aged adults
Sex	Occurs more often in men than women
Inflammatory bowel disease	About 5% to 7% of people with ulcerative colitis or Crohn's disease also have PSC
Geographical location	Diagnoses are higher in Northern Europe and North America than in other parts of the world
Genes	Certain gene variations may play a role in risk and development

Complications

Because PSC damages the bile ducts over years, its complications mostly involve the liver and the digestive system.

Complication	How it develops
Liver disease and failure	Long-term bile duct inflammation leads to damage and scarring of liver tissue, called cirrhosis, with progressive loss of liver function
Cancer	Significant risk of bile duct and gallbladder cancer; lower risk of liver and pancreas cancer; PSC with IBD raises colon and rectum cancer risk
Portal hypertension	High blood pressure in the portal vein, the major route for blood flowing into the liver; can cause pressure on digestive blood vessels leading to internal bleeding, and fluid leaking into the abdominal cavity
Bacterial infections	Infections of the bile ducts, particularly after procedures or significant blockage
Thinning bones (osteoporosis)	Bone thinning can occur over time
Vitamin deficiencies	Bile helps the intestines absorb vitamins A, D, E, and K, so PSC can leave the body short of these vitamins

How PSC Is Diagnosed

The primary diagnostic tool is an MRI of the bile ducts. A full workup combines blood tests, imaging, and sometimes a biopsy.

Liver function blood tests check protein and enzyme levels, such as alkaline phosphatase, to see how well the liver is working.

MRI of the bile ducts is the main test. Called magnetic resonance cholangiopancreatography (MRCP), it images the liver, bile ducts, gallbladder, and pancreas.

X-rays of the bile ducts offer another imaging option called a cholangiogram, which uses a dye to highlight the bile ducts on X-ray images. These tests usually are done if MRI is not an option. The dye may be delivered by an endoscope passed through the throat into the small intestine — a method called endoscopic retrograde cholangiopancreatography (ERCP) — or injected through the skin and into the liver.

Liver biopsy removes a small sample of liver tissue through a thin needle through the skin and into the liver. Examined under a microscope, it shows the condition of the bile ducts and liver tissues and is most useful if PSC is suspected but not clear on imaging, or if there is concern about overlap with autoimmune hepatitis.

Colonoscopy examines the large intestine. If you do not already have a diagnosis of inflammatory bowel disease, a colonoscopy tests for ulcerative colitis, Crohn's disease, or colitis. It also can reveal cancerous tumors or other irregular tissues in the colon, and it is part of regular monitoring after a diagnosis of PSC.

Test	What it shows
Liver function blood tests	Protein and enzyme levels such as alkaline phosphatase, showing how well the liver is working
MRI of bile ducts (MRCP)	Images of the liver, bile ducts, gallbladder, and pancreas — the primary diagnostic tool
Cholangiogram / ERCP	Dye highlights the bile ducts on X-ray; usually done if MRI is not an option
Liver biopsy	Tissue examined under a microscope for inflammation, scarring, and bile duct changes
Colonoscopy	Tests for IBD and screens for colon tumors; part of regular PSC monitoring

Treatment: No Cure Except Transplant

There are no approved medical therapies that alter the natural history of PSC. Treatments for PSC focus on managing symptoms and complications and monitoring liver damage.

Ursodiol, also called ursodeoxycholic acid, is a naturally occurring bile acid. For some people, low doses may result in signs of improved or more-stable liver function for a time, and it may reduce itching. Ursodiol does not prevent disease complications or delay disease progression.

Itching treatment follows a stepwise approach depending on severity:

Medicine	Used for	Notes
Antihistamines	Mild itching	May cause drowsiness — helpful for people kept awake by itchiness
Bile acid sequestrants (cholestyramine, colestipol)	Moderate to severe itching	Bind bile acids thought to cause itching; often cause constipation, cannot be used with several other medicines, and may cause vitamin K deficiency
Rifampin	Moderate to severe itching, when sequestrants cannot be used	An antibiotic; can cause liver inflammation, so regular blood tests are needed
Naltrexone (opioid antagonist)	Moderate to severe itching	Also used for alcohol and opioid use disorders; cannot be used with advanced liver disease

Nutrition support matters because PSC makes it hard for the body to absorb certain vitamins. Even on a healthy diet, you may not get all the nutrients you need. Health professionals may recommend vitamin supplements as tablets or as infusions through a vein. If the disease weakens the bones, calcium and vitamin D supplements may be added.

Blocked bile ducts can be treated with procedures done through ERCP. Balloon dilation runs a slender tube with an inflatable balloon at its tip through an endoscope and into a blocked bile duct; once in place, the balloon is inflated to open blockages in the larger bile ducts outside the liver. In stent placement, an endoscope and attached instruments place a small plastic tube called a stent in a blocked duct to hold it open — stents often need to be replaced. Blockages may be due to disease progression or may be a sign of bile duct cancer.

Bacterial infections of the bile ducts occur often because bile backs up in narrowed or blocked ducts. People with PSC may need ERCP procedures to prevent and treat these infections, plus repeated courses of antibiotics or antibiotics for long periods.

Liver transplant is the only treatment known to cure PSC. Surgeons remove a diseased liver and replace it with a healthy liver from a donor. However, not everyone with PSC needs one — many people live with PSC for years by managing symptoms and monitoring liver health. A transplant is only considered when the condition becomes advanced, causing liver failure, repeated infections, bile duct blockages, severe itching, or cancer that cannot be removed surgically. For those who need it, outcomes are excellent: the survival rate after liver transplant is over 90% at one year and about 80% at five years. It is important to know that PSC can sometimes return even after a successful transplant.

Prognosis

Life expectancy with PSC can vary a lot from person to person. On average, people live about 10 to 20 years after diagnosis without a liver transplant, though some progress faster and others more slowly.

PSC often progresses unpredictably. Some people remain stable for years, while others develop complications such as liver failure, repeated infections, or bile duct cancer more quickly. The survival rate after liver transplant, however, is excellent.

Self-Care: Protecting Your Liver Every Day

Many people with PSC are able to live full and meaningful lives, especially in the early years after diagnosis. PSC often progresses slowly. With regular monitoring, symptom management, and healthy lifestyle choices, people can continue work, family, and daily activities.

Self-care step	Why it matters
Don't drink alcohol	Protects an already-stressed liver
Get hepatitis A and B vaccinations	Prevents additional liver infections
Use care with chemicals at home and work	Reduces toxic liver exposure
Eat a balanced diet; limit fat, sugar, and salt; exercise; maintain a healthy weight	Supports overall liver health
Follow medicine directions; tell every pharmacist and clinician you have liver disease	Many medicines are processed by the liver
Ask about herbs and supplements before taking them	Some can harm the liver
Take recommended supplements (vitamins A, D, E, K; calcium if bones are weakened)	PSC impairs absorption of fat-soluble vitamins
Regular sleep schedule; no afternoon or evening caffeine	Helps manage extreme tiredness

Alternative therapies such as acupuncture, yoga, meditation, and massage may lessen pain and help cope with extreme tiredness linked to liver disease.

Preparing for Your Appointment

A first appointment may be because of symptoms or because of the results of routine blood tests that show signs of poor liver function. Your primary health professional may refer you to a digestive disease specialist, called a gastroenterologist, or a liver specialist, called a hepatologist.

Before the visit, ask about any pre-appointment restrictions, such as diet restrictions. Write down your symptoms — including any that seem unrelated — and key personal information, including major stresses or recent life changes. Make a list of all medicines, vitamins, and supplements you take, the dose of each, and the reasons for taking them. Consider taking a family member or friend along, and write down the questions you want to ask.

Questions worth asking your health care professional:

Can you explain my test results to me?
Will I need more tests?
How far has my PSC progressed?
How serious is the damage to my liver?
How will we know if I need a liver transplant?
What treatments can relieve my signs and symptoms?
What are the potential side effects of each treatment?
Should I be tested for inflammatory bowel disease?
What signs and symptoms signal that my condition is worsening?
When should I make another appointment?
Are there any restrictions I need to follow?
Are there brochures or websites you recommend?

Your health care professional is likely to ask when your symptoms began, whether they are continuous or occasional, how severe they are, whether you have frequent bouts of diarrhea or have noticed blood in your stool, how much alcohol you drink, your typical diet, and how much exercise you get.

Conclusion

Primary sclerosing cholangitis is a rare, immune-mediated liver disease in which inflammation scars and narrows the bile ducts, letting bile back up into the liver and damaging its cells. It is strongly linked to inflammatory bowel disease — 70% to 80% of people with PSC also have IBD, most often ulcerative colitis — and is diagnosed most often in middle-aged men. About half of people have no symptoms at diagnosis, so watch for extreme tiredness, unexplained itching, upper belly pain, diarrhea, fever from repeat bile duct infections, and jaundice. No approved medicine changes the course of PSC; care centers on symptom management, duct procedures, infection control, vitamin support, and liver protection, with liver transplant as the only cure for advanced disease — and outcomes after transplant are excellent.

CTA: If you have ulcerative colitis or Crohn's disease and unexplained fatigue or itching, ask your health care team about liver function tests and whether screening for PSC makes sense for you. Even a diagnosis without symptoms leads to monitoring that can catch complications early. Explore more Rinnit guides on liver and digestive health to understand how your liver works and what to do when it does not.

Frequently Asked Questions

What is primary sclerosing cholangitis (PSC)?

PSC is a rare, long-term liver disease caused by inflammation of the bile ducts — the tubes that carry bile from the liver to the small intestine, where bile helps break down fats. Scarring and narrowing of the ducts cause bile to back up into the liver, damaging liver cells and potentially leading to liver failure.

What causes primary sclerosing cholangitis?

PSC is an immune-mediated condition: the body's immune system attacks its own tissues. What triggers the bile duct inflammation is not clear. It develops from a combination of factors — possible genetic vulnerability plus immune problems and gut changes such as the microbiome or environmental exposures — rather than simple inheritance.

What are the symptoms of PSC?

Symptoms include extreme tiredness, itching, upper belly pain, diarrhea, fever related to repeat bile duct infections, and jaundice (yellowing of the whites of the eyes or skin). About half of people have no symptoms when they get a diagnosis.

Is PSC the same as primary biliary cholangitis?

No. Primary biliary cholangitis mainly damages the smaller bile ducts inside the liver, occurs mostly in women, and often responds to medicines. PSC involves scarring and narrowing of bile ducts, occurs more often in men, and has no approved medicine that alters its course.

What is the link between PSC and inflammatory bowel disease?

The connection is strong: about 70% to 80% of people with PSC also have IBD, most often ulcerative colitis. Conversely, about 5% to 7% of people with ulcerative colitis or Crohn's disease also have PSC.

How is PSC diagnosed?

With liver function blood tests (checking enzymes such as alkaline phosphatase), an MRI of the bile ducts called MRCP — the primary diagnostic tool — cholangiograms with dye if MRI is not an option, a liver biopsy when imaging is unclear, and a colonoscopy to test for IBD and screen the colon.

Is there a cure for primary sclerosing cholangitis?

Liver transplant is the only treatment known to cure PSC. It is considered only for advanced disease causing liver failure, repeated infections, bile duct blockages, severe itching, or cancer that cannot be removed surgically. Survival after transplant is over 90% at one year and about 80% at five years, though PSC can sometimes return.

What is the life expectancy with PSC?

On average, people live about 10 to 20 years after diagnosis without a liver transplant, but the disease progresses unpredictably — some people remain stable for years, while others develop complications more quickly.